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(6-5*x)/7+4/7 = (-2*x)/5 // - (-2*x)/5
(6-5*x)/7-((-2*x)/5)+4/7 = 0
(6-5*x)/7+(2/5)*x+4/7 = 0
(6-5*x)/7+(2*x)/5+4/7 = 0
(5*(6-5*x))/(5*7)+(2*7*x)/(5*7)+(4*5)/(5*7) = 0
5*(6-5*x)+2*7*x+4*5 = 0
20-11*x+30 = 0
50-11*x = 0
(50-11*x)/(5*7) = 0
(50-11*x)/(5*7) = 0 // * 5*7
50-11*x = 0
50-11*x = 0 // - 50
-11*x = -50 // : -11
x = -50/(-11)
x = 50/11
x = 50/11
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