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(3/4)*x-((5/6)*y) = -4 // + 4
(3/4)*x-((5/6)*y)+4 = 0
(3/4)*x+(-5/6)*y+4 = 0
3/4*x-5/6*y+4 = 0 // - 4-5/6*y
3/4*x = -(4-5/6*y) // : 3/4
x = (-(4-5/6*y))/3/4
x = -4/3*(4-5/6*y)
x = -4/3*(4-5/6*y)
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