Question

Indicate which property is illustrated in Step 2.

Step 1 9 + 10x - 9 - 4x + 6 = 9 + (10x - 9) - 4x + 6
Step 2 = 9 + (-9 + 10x) - 4x + 6
Step 3 = [9 + (-9)] + (10x - 4x) + 6
Step 4 = 0 + (10x - 4x) + 6
Step 5 = (10x - 4x) + 6
Step 6 = (10 - 4)x + 6
Step 7 = 6x + 6

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Answer 1

@Isaiah.Feynman Can you please help? :)

Answer 2

Commutative property of addition