Question

Indicate which property is illustrated in Step 1.

Step 1 9 - 8x - 9 + 9x = (9 - 8x) + (-9 + 9x)
Step 2 = (9 - 8x) + (9x - 9)
Step 3 = 9 + (-8x + 9x) - 9
Step 4 = 9 + (-8 + 9)x - 9
Step 5 = 9 + x - 9
Step 6 = x + 9 - 9
Step 7 = x + 0
Step 8 = x

A- identity
B- distributive
C- commutative
D- associative

Answer 1

d i think