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x in (-oo:+oo)
4*(3*x+8) = -16 // + 16
4*(3*x+8)+16 = 0
4*(3*x+8)+16 = 0
12*x+48 = 0
12*x+48 = 0
12*x+48 = 0 // - 48
12*x = -48 // : 12
x = -48/12
x = -4
x = -4
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