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x in (-oo:+oo)
(x-1)/(-4) = 2/3 // - 2/3
(x-1)/(-4)-(2/3) = 0
(x-1)/(-4)-2/3 = 0
(3*(x-1))/(-4*3)+(-4*(-2))/(-4*3) = 0
3*(x-1)-4*(-2) = 0
3*x+5 = 0
(3*x+5)/(-4*3) = 0
(3*x+5)/(-4*3) = 0 // * -4*3
3*x+5 = 0
3*x+5 = 0 // - 5
3*x = -5 // : 3
x = -5/3
x = -5/3
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