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(3*x)/5-((x-2)/2) = (x+5)/7 // - (x+5)/7
(3*x)/5-((x-2)/2)-((x+5)/7) = 0
(-1*(x-2))/2+(-1*(x+5))/7+(3*x)/5 = 0
(-1*5*7*(x-2))/(2*5*7)+(-1*2*5*(x+5))/(2*5*7)+(2*3*7*x)/(2*5*7) = 0
2*3*7*x-1*5*7*(x-2)-1*2*5*(x+5) = 0
42*x-45*x+20 = 0
20-3*x = 0
(20-3*x)/(2*5*7) = 0
(20-3*x)/(2*5*7) = 0 // * 2*5*7
20-3*x = 0
20-3*x = 0 // - 20
-3*x = -20 // : -3
x = -20/(-3)
x = 20/3
x = 20/3
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