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(1/2)*(8*x+4) = (1/3)*(6*x-12) // - (1/3)*(6*x-12)
(1/2)*(8*x+4)-((1/3)*(6*x-12)) = 0
(1/2)*(8*x+4)+(-1/3)*(6*x-12) = 0
1/2*(8*x+4)-1/3*(6*x-12) = 0
1/2*(8*x+4)-1/3*(6*x-12) = 0
2*x+6 = 0
2*x+6 = 0
2*x+6 = 0 // - 6
2*x = -6 // : 2
x = -6/2
x = -3
x = -3
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