Problem
$-y+9 z-16 y-25 z$
Solution
Step 1 ：Combine like terms: \(-y + 9z - 16y - 25z = -1y - 16y + 9z - 25z\)
Step 2 ：Simplify the expression: \(-17y - 16z\)
Step 3 ：\(\boxed{-17y - 16z}\)
Step 1 ：Combine like terms: \(-y + 9z - 16y - 25z = -1y - 16y + 9z - 25z\)
Step 2 ：Simplify the expression: \(-17y - 16z\)
Step 3 ：\(\boxed{-17y - 16z}\)
