Solving One-Step Equations with Addition and Subtraction — Examples
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- Use addition and/or subtraction to isolate the variable! When you're solving equations, you're trying to find the value of the variables in the equations. To do this, you want t…
By Zora Gilbert, Alex Federspiel, Jonathan Heller, Caroline K, Joshua Siktar
- Use addition to get the variable alone on one side of the equation To solve algebraic equations, you have to figure out what value of the variable makes the equation true. To do…
By Zora Gilbert, Jonathan Heller, Alex Federspiel, Caroline K
- (Videos) Solving Equations with Addition by mathman1024 Here's a video by mathman1024 that shows you how to solve equations written with addition. There's another video with mor…
By Alex Federspiel, Zora Gilbert, Jonathan Heller, Caroline K, Joshua Siktar
- Solving a Subtraction Equation Using Inverse Operations To easily solve one-step equations, the one rule you should always remember is to isolate the variable alone onto one sid…
By Eunji Kwon, Alex Federspiel, Jonathan Heller, Caroline K
- Solving By Addition Solving an equation means that you are trying to find the values of the variables in the equation. We do this by altering the problem to isolate the variable…
By Eunji Kwon, Jonathan Heller, Alex Federspiel, Caroline K, Joshua Siktar
Problems 73
- Solve for xxx: x−5=7x-5=7x−5=7
- Solve for yyy: −3+y=4-3 + y = 4−3+y=4
- Solve for xxx. x−4=3x-4=3x−4=3
- Solve for xxx. x−3=8x-3=8x−3=8
- Solve for xxx. x+7=−4x+7=-4x+7=−4
- Solve for xxx. x−3=−10x-3=-10x−3=−10
- Solve for xxx. x−2=−3x-2=-3x−2=−3
- Solve for xxx in the equation x−13=−3x-13=-3x−13=−3.
- Solve for xxx in the equation 3+x=103+x=103+x=10.
- Solve for xxx in the equation 12=x+612=x+612=x+6.
- Solve for xxx in the equation x−8=10x-8=10x−8=10.
- Solve for xxx in the equation 13=12−x13=12-x13=12−x.
- Solve for xxx in the equation x+8=22x+8=22x+8=22.
- Solve for xxx in the equation 14=2+x14=2+x14=2+x.
- Solve for xxx in the equation x+8=88x+8=88x+8=88.
- Solve for xxx in the following equation. x+7+9=29x+7+9=29x+7+9=29
- Solve for xxx in the equation 14=x+(−40)14=x+(-40)14=x+(−40).
- Solve for xxx in the equation 6=10+x6=10+x6=10+x.
- Solve for xxx in the equation x−8=10x-8=10x−8=10.
- Solve for xxx in the equation x−13=44x-13=44x−13=44.
- Solve for xxx in the equation 13=20−x13=20-x13=20−x.
- Solve for xxx in the equation 13=x−813=x-813=x−8.
- Solve for xxx in the equation x−11=−22x-11=-22x−11=−22.
- Solve for xxx in the equation −10=−6−x-10=-6-x−10=−6−x.
- Solve for xxx in the equation x+5+8=26x+5+8=26x+5+8=26.
- There are 343434 boxes and when xxx boxes are subtracted we get 181818 boxes, find the value of xxx.
- Calculate the value of xxx: x−15=23x-15=23x−15=23
- Calculate the value of xxx: x+35=410x+\frac{3}{5}=\frac{4}{10}x+53=104
- Calculate the value of xxx: x−1016=78x-\frac{10}{16}=\frac{7}{8}x−1610=87
- Calculate the value of zzz: z+18=−5z+18=-5z+18=−5
- Calculate the value of www: w−2=−9w-2=-9w−2=−9
- How many students were originally in the classroom if, after 7 students walked in, there were 31 students in total?
- Jeri counted 181818 fish in a pond after 666 swam away. Choose a one-step equation that accurately represents the above scenario, where xxx is the original number of fish.
- Solve for xxx: x+3=−124x+3=\frac{-12}{4}x+3=4−12
- After Bobby added 666 stuffed animals to his collection on Wednesday, he ended up with 282828 stuffed animals. How many did he have before Wednesday?
- Carson is baking bread and needs nine cups of flour for his recipe. If he already put in three cups, how many more does he need?
- Jason had 18\1818 before doing some chores. Afterwards, his parents gave him some cash and he ended up with 35\3535. How much money did Jason's parents give him?
- Sally saw that there were 222222 seashells by the sea shore after Sammy had already picked up 171717 shells. Find an equation to solve for sss, where sss is the number of shells…
- At 888 AM, a store had 100100100 copies of a best-selling book. At 101010 AM, an employee observed there were only 505050 copies left. Write an expression to solve for bbb, the …
- In the atom, a proton has a positive charge (+1)(+1)(+1), and an electron has a negative charge (−1)(-1)(−1). If a hydrogen atom has 111 proton, and an oxygen atom has 888 proto…
- What is xxx in the equation x−y=3x-y=3x−y=3 when y=2y=2y=2?
- Put these equations in order from smallest xxx value to largest. (1)x+5=12(2)7+x=12(3)7+5=x\begin{alignat}{2} (1)\quad&x+5&&=12\\ (2)\quad&7+x&&=12\\ (3)\quad&7+5&&=x \end{align…
- Isolate the variable to solve the equation. x+3=7x+3=7x+3=7
- Isolate the variable to solve the equation. x+5=10x+5=10x+5=10
- Isolate the variable and solve the equation. x−6=8x-6=8x−6=8
- Isolate the variable and solve the equation. x−9=−3x-9=-3x−9=−3
- Isolate the variable to solve the equation. 7−x=37-x=37−x=3
- Johnny Appleseed bought 10 apples from a market and placed them on a table. When he came back from work, there were 26 apples on the table. Surprised, Johnny asked his brother, …
- Find xxx in 7+x=327+x=327+x=32.
- Find xxx in 6+x=246+x=246+x=24.
- Find xxx in 6−x=−126-x=-126−x=−12.
- Solve for xxx in the equation x−72=120x-72=120x−72=120.
- Solve for xxx: 4+x=y+34+x=y+34+x=y+3
- Solve for xxx: 19+x=3719+x=3719+x=37
- x=x+2x = x +2x=x+2 xxx represents some number. Can you solve for xxx? If not, what is the reason?
- x+5=10−xx+5 = 10 - xx+5=10−x Can you solve for xxx? If so, what is xxx?
- Given that x+1=1x+1 =1x+1=1, what does x100x^{100}x100 equal to?
- Let the amount of the apples Roxanne needs be xxx. Which of the following correctly represents the above information? Choose all the right answers.
- Which ones of the following are incorrect representations of the information above?
- a+2=2(a+2)a+2=2(a+2)a+2=2(a+2) Can you solve for aaa? If yes, what is aaa?
- Given that x−1=5x-1=5x−1=5, what is (x−1)+10(x-1)+10(x−1)+10?
- How many apples did Luis pick?
- Let the amount of apples Ian picked be xxx. Which one of the following equations is correct?
- 11−x=1511-x = 1511−x=15 Solve for xxx.
- Lillie and Mica are twins, they have a brother who is 3 years younger. The sum of their age is 30. How old is the little brother?
- Solve for xxx: x−2=4x-2=4x−2=4 Solve the equation by addition.
- Martina got a big box of Pocky and ate one packet every day for the past 555 days. Today, she checked the box and there are 888 packs left. Say there are originally xxx packets …
- Martina got a big box of Pocky and ate one packet every day for the past 5 days. Today, she checked the box and there are 8 packs left. She suspects her sister Christine ate som…
- What is the solution to the equation: x+38=378x+38=378x+38=378
- Which of the following is a solution to the equation? x+9=27x+9=27x+9=27
- What is the solution for the following equation? 32=x+732 = x + 732=x+7
- What is the solution in the following equation? x−7=4−2x - 7 = 4 - 2x−7=4−2
- What is the solution (xxx) for the following equation? 3+x=10+173 + x = 10 + 173+x=10+17