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(1/5)*(2*x+4) = 4*(2-(2*x))+18 // - 4*(2-(2*x))+18
(1/5)*(2*x+4)-(4*(2-(2*x)))-18 = 0
(1/5)*(2*x+4)-4*(2-2*x)-18 = 0
1/5*(2*x+4)-4*(2-2*x)-18 = 0
1/5*(2*x+4)-4*(2-2*x)-18 = 0
42/5*x-18-36/5 = 0
42/5*x-126/5 = 0
42/5*x-126/5 = 0
42/5*x-126/5 = 0 // + 126/5
42/5*x = 126/5 // : 42/5
x = 126/5/42/5
x = 3
x = 3
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