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x in (-oo:+oo)
(x+3)/5 = (3*x+1)/4 // - (3*x+1)/4
(x+3)/5-((3*x+1)/4) = 0
(x+3)/5+(-1*(3*x+1))/4 = 0
(4*(x+3))/(4*5)+(-1*5*(3*x+1))/(4*5) = 0
4*(x+3)-1*5*(3*x+1) = 0
7-11*x = 0
(7-11*x)/(4*5) = 0
(7-11*x)/(4*5) = 0 // * 4*5
7-11*x = 0
7-11*x = 0 // - 7
-11*x = -7 // : -11
x = -7/(-11)
x = 7/11
x = 7/11
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