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x in (-oo:+oo)
(1/2)*(x-3)-x+3/2 = 5 // - 5
(1/2)*(x-3)-x+3/2-5 = 0
1/2*(x-3)-x+3/2-5 = 0
(1/2*2*(x-3))/2+(2*(-x))/2+3/2+(-5*2)/2 = 0
1/2*2*(x-3)+2*(-x)-5*2+3 = 0
3-x-10-3 = 0
-x-10 = 0
(-x-10)/2 = 0
(-x-10)/2 = 0 // * 2
-x-10 = 0
-x-10 = 0 // + 10
-x = 10 // * -1
x = -10
x = -10
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