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Mathematics 18 Online
OpenStudy (anonymous):

Indicate which property is illustrated in Step 4. Step 1 10 + 9x - 10 - 4x + 6 = 10 + (9x - 10) - 4x + 6 Step 2 = 10 + (-10 + 9x) - 4x + 6 Step 3 = [10 + (-10)] + (9x - 4x) + 6 Step 4 = 0 + (9x - 4x) + 6 Step 5 = (9x - 4x) + 6 Step 6 = (9 - 4)x + 6 Step 7 = 5x + 6 additive inverse distributive associative additive identity

OpenStudy (yttrium):

Associative.

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