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