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Algebra
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OpenStudy (anonymous):
Indicate which property is illustrated in Step 8. Step 1 9 - 3x - 9 + 4x = (9 - 3x) + (-9 + 4x) Step 2 = (9 - 3x) + (4x - 9) Step 3 = 9 + (-3x + 4x) - 9 Step 4 = 9 + (-3 + 4)x - 9 Step 5 = 9 + x - 9 Step 6 = x + 9 - 9 Step 7 = x + 0 Step 8 = x A-commutative B- identity C- distributive D- associative
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OpenStudy (phebe):
B
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