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x in (-oo:+oo)
3*(x-(1/2))+(1/2)*(2*x+19) = 0
3*(x-1/2)+(1/2)*(2*x+19) = 0
3*(x-1/2)+1/2*(2*x+19) = 0
3*(x-1/2)+1/2*(2*x+19) = 0
4*x+8 = 0
4*x+8 = 0
4*x+8 = 0 // - 8
4*x = -8 // : 4
x = -8/4
x = -2
x = -2
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