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(2/3)*(12*x-y)-((1/4)*(x/2-10)) = 0
(2/3)*(12*x-y)+(-1/4)*(x/2-10) = 0
2/3*(12*x-y)-1/4*(1/2*x-10) = 0
2/3*(12*x-y)-1/4*(1/2*x-10) = 0
63/8*x-2/3*y+5/2 = 0
63/8*x-2/3*y+5/2 = 0
63/8*x-2/3*y+5/2 = 0 // - 5/2-2/3*y
63/8*x = -(5/2-2/3*y) // : 63/8
x = (-(5/2-2/3*y))/63/8
x = -8/63*(5/2-2/3*y)
x = -8/63*(5/2-2/3*y)
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