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x in (-oo:+oo)
(2/5)*x+8 = 3*x+183/5 // - 3*x+183/5
(2/5)*x-(3*x)-(183/5)+8 = 0
(2/5)*x-3*x-183/5+8 = 0
-13/5*x-143/5 = 0 // + 143/5
-13/5*x = 143/5 // : -13/5
x = 143/5/(-13/5)
x = -11
x = -11
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