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x in (-oo:+oo)
2*(x-1)+x/2 = (5*x)/2+4 // - (5*x)/2+4
2*(x-1)+x/2-((5*x)/2)-4 = 0
2*(x-1)+x/2+(-5/2)*x-4 = 0
2*(x-1)+x/2+(-5*x)/2-4 = 0
(2^2*(x-1))/2+x/2+(-5*x)/2+(-4*2)/2 = 0
2^2*(x-1)+x-5*x-4*2 = 0
5*x-5*x-8-4 = 0
-8-4 = 0
-12 = 0
-12/2 = 0
-12/2 = 0 // * 2
-12 = 0
x belongs to the empty set
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