Practice problem
We have 444 numbers a,b,c,da, b, c,da,b,c,d and we know: a×b=c×da \times b = c \times da×b=c×d
Which one of the following is true for sure? \\ \\
a+ba+ba+b is equal to c+dc + dc+d
a=c,b=da = c, b = da=c,b=d
a=d,b=ca = d, b = ca=d,b=c
We cannot conclude anything of the above with the given information.
Type a concept, like “slope” or “photosynthesis”.
