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(2*(x-2*y))/3-((3*x)/2) = -13/6 // + -13/6
(2*(x-2*y))/3-((3*x)/2)-(-13/6) = 0
(2*(x-2*y))/3+(-3/2)*x+13/6 = 0
(2*(x-2*y))/3+(-3*x)/2+13/6 = 0
(6*2^2*(x-2*y))/(2*3*6)+(-3*3*6*x)/(2*3*6)+(2*3*13)/(2*3*6) = 0
6*2^2*(x-2*y)-3*3*6*x+2*3*13 = 0
78-30*x-48*y = 0
(78-30*x-48*y)/(2*3*6) = 0
(78-30*x-48*y)/(2*3*6) = 0 // * 2*3*6
78-30*x-48*y = 0
78-30*x-48*y = 0 // - 78-48*y
-30*x = -(78-48*y) // : -30
x = (-(78-48*y))/(-30)
x = (78-48*y)/30
x = (78-48*y)/30
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