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x in (-oo:+oo)
(x-3)/5 = (x-39)/2 // - (x-39)/2
(x-3)/5-((x-39)/2) = 0
(x-3)/5+(-1*(x-39))/2 = 0
(2*(x-3))/(2*5)+(-1*5*(x-39))/(2*5) = 0
2*(x-3)-1*5*(x-39) = 0
189-3*x = 0
(189-3*x)/(2*5) = 0
(189-3*x)/(2*5) = 0 // * 2*5
189-3*x = 0
189-3*x = 0 // - 189
-3*x = -189 // : -3
x = -189/(-3)
x = 63
x = 63
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