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(1/3)*(42-(18*x)) = 2*(8-(4*x)) // - 2*(8-(4*x))
(1/3)*(42-(18*x))-(2*(8-(4*x))) = 0
(1/3)*(42-18*x)-2*(8-4*x) = 0
1/3*(42-18*x)-2*(8-4*x) = 0
1/3*(42-18*x)-2*(8-4*x) = 0
2*x-2 = 0
2*x-2 = 0
2*x-2 = 0 // + 2
2*x = 2 // : 2
x = 2/2
x = 1
x = 1
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