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x in (-oo:+oo)
(1/5)*(3*x+5) = 8*x // - 8*x
(1/5)*(3*x+5)-(8*x) = 0
(1/5)*(3*x+5)-8*x = 0
1/5*(3*x+5)-8*x = 0
1/5*(3*x+5)-8*x = 0
1-37/5*x = 0
1-37/5*x = 0
1-37/5*x = 0 // - 1
-37/5*x = -1 // : -37/5
x = -1/(-37/5)
x = 5/37
x = 5/37
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