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Mathematics 23 Online
OpenStudy (anonymous):

4. Indicate which property is illustrated in Step 1. Step 1 12 - 8x - 12 + 9x = (12 - 8x) + (-12 + 9x) Step 2 = (12 - 8x) + (9x - 12) Step 3 = 12 + (-8x + 9x) - 12 Step 4 = 12 + (-8 + 9)x - 12 Step 5 = 12 + x - 12 Step 6 = x + 12 - 12 Step 7 = x + 0 Step 8 = x identity distributive associative commutative

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