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(1/2)*x-3*x+5/7 = -135/154 // + -135/154
(1/2)*x-3*x+5/7-(-135/154) = 0
(1/2)*x-3*x+5/7+135/154 = 0
35/22-5/2*x = 0 // - 35/22
-5/2*x = -35/22 // : -5/2
x = -35/22/(-5/2)
x = 7/11
x = 7/11
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