Answer:
3(x + 4) = 3(x) + 3(4)3(x + 4) = 3x + 123x + 12 = 3x + 12
Subtract 12 from both sides3x + 12 - 12 = 3x + 12 - 12
3x = 3x3x - 3x = 3x - 3x= 0
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