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x in (-oo:+oo)
(3*x-2)/7 = (6*x-5)/13 // - (6*x-5)/13
(3*x-2)/7-((6*x-5)/13) = 0
(3*x-2)/7+(-1*(6*x-5))/13 = 0
(13*(3*x-2))/(7*13)+(-1*7*(6*x-5))/(7*13) = 0
13*(3*x-2)-1*7*(6*x-5) = 0
9-3*x = 0
(9-3*x)/(7*13) = 0
(9-3*x)/(7*13) = 0 // * 7*13
9-3*x = 0
9-3*x = 0 // - 9
-3*x = -9 // : -3
x = -9/(-3)
x = 3
x = 3
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