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x in (-oo:+oo)
4*(2*x+1) = 76 // - 76
4*(2*x+1)-76 = 0
4*(2*x+1)-76 = 0
8*x-72 = 0
8*x-72 = 0
8*x-72 = 0 // + 72
8*x = 72 // : 8
x = 72/8
x = 9
x = 9
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