Identify the property used in Step 4.
Step 1 2 + 5x + 10 + 11x - 10 = 2 + 5x + 10 + (11x - 10)
Step 2 = 2 + 5x + 10 + (-10 + 11x)
Step 3 = 2 + 5x + [10 + (-10) ] + 11x
Step 4 = 2 + 5x + 0 + 11x
Step 5 = 2 + 5x + 11x
Step 6 = 2 + (5 + 11) x
Step 7 = 2 + 16x
Step 8 = 16x + 2
additive inverse
commutative
distributive
associative
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