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(1/2)*(6*x-14)-((1/3)*(15*x-(7*y))) = 0
(1/2)*(6*x-14)+(-1/3)*(15*x-7*y) = 0
1/2*(6*x-14)-1/3*(15*x-7*y) = 0
1/2*(6*x-14)-1/3*(15*x-7*y) = 0
7/3*y-2*x-7 = 0
7/3*y-2*x-7 = 0
7/3*y-2*x-7 = 0 // - 7/3*y-7
-2*x = -(7/3*y-7) // : -2
x = (-(7/3*y-7))/(-2)
x = (7-(7/3*y))/(-2)
x = (7-(7/3*y))/(-2)
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