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(3*w-3*v)/(-4) = (9*v+x)/6 // - (9*v+x)/6
(3*w-3*v)/(-4)-((9*v+x)/6) = 0
(3*w-3*v)/(-4)+(-1*(9*v+x))/6 = 0
(6*(3*w-3*v))/(-4*6)+(-4*(-1)*(9*v+x))/(-4*6) = 0
6*(3*w-3*v)-4*(-1)*(9*v+x) = 0
18*v+18*w+4*x = 0
(18*v+18*w+4*x)/(-4*6) = 0
(18*v+18*w+4*x)/(-4*6) = 0 // * -4*6
18*v+18*w+4*x = 0
18*v+18*w+4*x = 0 // - 18*v+18*w
4*x = -(18*v+18*w) // : 4
x = (-(18*v+18*w))/4
x = (-(18*v+18*w))/4
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