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Anonymous
Well if it is worded right then 4xb-1+(-4)+4b=4b-1-4+4b=4b+4b-1-4=8b-5
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2x + x + 4 +2x = x + 20 5x + 4 = x + 20 5x - x = 20 - 4 4x = 16 x = 4
(x + 4)(x + 1) x = -1 or -4
4(x + 1)(x + 1)
(x+3)(x+4) = x2+7x+12
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