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x in (-oo:+oo)
(1/5)*(2*x+115) = 5*x // - 5*x
(1/5)*(2*x+115)-(5*x) = 0
(1/5)*(2*x+115)-5*x = 0
1/5*(2*x+115)-5*x = 0
1/5*(2*x+115)-5*x = 0
23-23/5*x = 0
23-23/5*x = 0
23-23/5*x = 0 // - 23
-23/5*x = -23 // : -23/5
x = -23/(-23/5)
x = 5
x = 5
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