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3*x+x*((2*y)/6)+y = 3/4 // - 3/4
3*x+x*((2*y)/6)+y-(3/4) = 0
3*x+x*((2*y)/6)+y-3/4 = 0
1/3*x*y+y-3/4 = 0 // - y-3/4
1/3*x*y = -(y-3/4) // : 1/3*y
x = (-(y-3/4))/(1/3*y)
x = 3*y^-1*(3/4-y)
x = 3*y^-1*(3/4-y)
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