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(3/2)*(x-5)+x = 3-((1/2)*x) // - 3-((1/2)*x)
(3/2)*(x-5)+x+(1/2)*x-3 = 0
3/2*(x-5)+x+x/2-3 = 0
(3/2*2*(x-5))/2+(2*x)/2+x/2+(-3*2)/2 = 0
3/2*2*(x-5)+2*x+x-3*2 = 0
5*x+x-15-6 = 0
6*x-15-6 = 0
6*x-21 = 0
(6*x-21)/2 = 0
(6*x-21)/2 = 0 // * 2
6*x-21 = 0
6*x-21 = 0 // + 21
6*x = 21 // : 6
x = 21/6
x = 7/2
x = 7/2
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