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X+(3/4)*x-(3/5) = (-1/4)*(x+5/6) // - (-1/4)*(x+5/6)
X-((-1/4)*(x+5/6))+(3/4)*x-(3/5) = 0
(1/4)*(x+5/6)+X+(3/4)*x-3/5 = 0
1/4*(x+5/6)+X+(3*x)/4-3/5 = 0
(1/4*4*5*(x+5/6))/(4*5)+(4*5*X)/(4*5)+(3*5*x)/(4*5)+(-3*4)/(4*5) = 0
1/4*4*5*(x+5/6)+4*5*X+3*5*x-3*4 = 0
20*X+5*x+15*x-12+25/6 = 0
20*X+20*x-12+25/6 = 0
20*X+20*x-47/6 = 0
(20*X+20*x-47/6)/(4*5) = 0
(20*X+20*x-47/6)/(4*5) = 0 // * 4*5
20*X+20*x-47/6 = 0
20*X+20*x-47/6 = 0 // - 20*X-47/6
20*x = -(20*X-47/6) // : 20
x = (-(20*X-47/6))/20
x = (47/6-(20*X))/20
x = (47/6-(20*X))/20
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