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x in (-oo:+oo)
-(4*x)-1/5 = (-1/7)*x+803/35 // - (-1/7)*x+803/35
-(4*x)-((-1/7)*x)-1/5-(803/35) = 0
(1/7)*x-4*x-1/5-803/35 = 0
-27/7*x-162/7 = 0 // + 162/7
-27/7*x = 162/7 // : -27/7
x = 162/7/(-27/7)
x = -6
x = -6
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