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(3*x-5)/10 = (2*x-4)/5 // - (2*x-4)/5
(3*x-5)/10-((2*x-4)/5) = 0
(3*x-5)/10+(-1*(2*x-4))/5 = 0
(5*(3*x-5))/(5*10)+(-1*10*(2*x-4))/(5*10) = 0
5*(3*x-5)-1*10*(2*x-4) = 0
15-5*x = 0
(15-5*x)/(5*10) = 0
(15-5*x)/(5*10) = 0 // * 5*10
15-5*x = 0
15-5*x = 0 // - 15
-5*x = -15 // : -5
x = -15/(-5)
x = 3
x = 3
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