Question

subtract.
(-3s + 7) - (-9s + 2)

Explanation:

Step1: Remove parentheses

$(-3s + 7) - (-9s + 2) = -3s + 7 + 9s - 2$

Step2: Combine like terms

$(-3s + 9s) + (7 - 2) = 6s + 5$

Answer:

$6s + 5$