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x/6-x+30*y+1 = 0
30*y-5/6*x+1 = 0 // - 30*y+1
-5/6*x = -(30*y+1) // : -5/6
x = (-(30*y+1))/(-5/6)
x = 6/5*(30*y+1)
x = 6/5*(30*y+1)
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