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