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Mathematics 15 Online
OpenStudy (anonymous):

HELP! Indicate which property is illustrated in Step 6. Step 1 7 - 4x - 7 + 5x = (7 - 4x) + (-7 + 5x) Step 2 = (7 - 4x) + (5x - 7) Step 3 = 7 + (-4x + 5x) - 7 Step 4 = 7 + (-4 + 5)x - 7 Step 5 = 7 + x - 7 Step 6 = x + 7 - 7 Step 7 = x + 0 Step 8 = x A - distributive B - commutative C - identity D - associative

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