Question

find an expression which represents the sum of $(-9x + 3y)$ and $(-3x + 5y)$ in simplest terms.

Explanation:

Step1: Set up the sum

$(-9x + 3y) + (-3x + 5y)$

Step2: Group like terms

$(-9x - 3x) + (3y + 5y)$

Step3: Combine like terms

$-12x + 8y$

Answer:

$-12x + 8y$