When solving an equation, Drew's first step is shown below. Which property justifies Drew's first step?
Original Equation:
-10(–202 – 9) +1 = 10x2 – 7
First Step:
-10(–2x2 – 9) = 10x2 – 8
associative property of addition
commutative property of multiplication
distributive property of
multiplication over addition
subtraction property of equality
