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