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3-((1/4)*y) = 2*x // - 2*x
3-(2*x)-((1/4)*y) = 0
(-1/4)*y-2*x+3 = 0
3-2*x-1/4*y = 0 // - 3-1/4*y
-2*x = -(3-1/4*y) // : -2
x = (-(3-1/4*y))/(-2)
x = (3-1/4*y)/2
x = (3-1/4*y)/2
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