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x in (-oo:+oo)
(2/5)*x+1/10 = 2*x+177/10 // - 2*x+177/10
(2/5)*x-(2*x)+1/10-(177/10) = 0
(2/5)*x-2*x+1/10-177/10 = 0
-8/5*x-88/5 = 0 // + 88/5
-8/5*x = 88/5 // : -8/5
x = 88/5/(-8/5)
x = -11
x = -11
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