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(3/4)*(2*x+3)-(31/2) = (4/5)*(1-x) // - (4/5)*(1-x)
(3/4)*(2*x+3)-((4/5)*(1-x))-(31/2) = 0
(3/4)*(2*x+3)+(-4/5)*(1-x)-31/2 = 0
3/4*(2*x+3)-4/5*(1-x)-31/2 = 0
(3/4*2*(2*x+3))/2+(-4/5*2*(1-x))/2-31/2 = 0
3/4*2*(2*x+3)-4/5*2*(1-x)-31 = 0
23/5*x-31+29/10 = 0
23/5*x-281/10 = 0
(23/5*x-281/10)/2 = 0
(23/5*x-281/10)/2 = 0 // * 2
23/5*x-281/10 = 0
23/5*x-281/10 = 0 // + 281/10
23/5*x = 281/10 // : 23/5
x = 281/10/23/5
x = 281/46
x = 281/46
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