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(2/3)*(x-4) = (1/3)*(-2*x-6) // - (1/3)*(-2*x-6)
(2/3)*(x-4)-((1/3)*(-2*x-6)) = 0
(2/3)*(x-4)+(-1/3)*(-2*x-6) = 0
2/3*(x-4)-1/3*(-2*x-6) = 0
2/3*(x-4)-1/3*(-2*x-6) = 0
4/3*x-2/3 = 0
4/3*x-2/3 = 0
4/3*x-2/3 = 0 // + 2/3
4/3*x = 2/3 // : 4/3
x = 2/3/4/3
x = 1/2
x = 1/2
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