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x in (-oo:+oo)
(x+1)/2 = (3-x)/4 // - (3-x)/4
(x+1)/2-((3-x)/4) = 0
(x+1)/2+(-1*(3-x))/4 = 0
(4*(x+1))/(2*4)+(-1*2*(3-x))/(2*4) = 0
4*(x+1)-1*2*(3-x) = 0
6*x-2 = 0
(6*x-2)/(2*4) = 0
(6*x-2)/(2*4) = 0 // * 2*4
6*x-2 = 0
6*x-2 = 0 // + 2
6*x = 2 // : 6
x = 2/6
x = 1/3
x = 1/3
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