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