# Thread: Systems in 3 variables #2

1. ## Systems in 3 variables #2

Have to find x,y,and z.

1.)
x - y - 5z = -2
y + 3z = 9
x + y + z = 16

1) Solve: .$\displaystyle \begin{array}{ccc} x - y - 5z &=& \text{-}2 \\ \qquad y + 3z &=& 9 \\ x + y + z &=& 16 \end{array}$
. . $\displaystyle \begin{Bmatrix}x &=& 7 + 2t \\ y &=& 9 - 3t \\ z &=& t \end{Bmatrix}$