Practice problem
Solve this system of linear equations using the inverse. {9x+2y+8z=1677x−9y+5z=139y+4z=133\begin{cases}9x+2y+8z&=167\\7x-9y+5z&=13\\9y+4z&=133\end{cases}⎩⎨⎧9x+2y+8z7x−9y+5z9y+4z=167=13=133
x=6y=10z=14\begin{align}x&=6\\y&=10\\z&=14\end{align}xyz=6=10=14
x=5y=9z=13\begin{align}x&=5\\y&=9\\z&=13\end{align}xyz=5=9=13
x=4y=8z=12\begin{align}x&=4\\y&=8\\z&=12\end{align}xyz=4=8=12
x=3y=7z=11\begin{align}x&=3\\y&=7\\z&=11\end{align}xyz=3=7=11
Type a concept, like “slope” or “photosynthesis”.
