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18*((5/6)*y-((2/3)*x))-(5*y) = 0
18*((-2/3)*x+(5/6)*y)-5*y = 0
18*(5/6*y-2/3*x)-5*y = 0
18*(5/6*y-2/3*x)-5*y = 0
10*y-12*x = 0
10*y-12*x = 0
10*y-12*x = 0 // - 10*y
-12*x = -(10*y) // : -12
x = (-(10*y))/(-12)
x = (5*y)/6
x = (5*y)/6
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