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x in (-oo:+oo)
-3.5/(-5) = 5*x // - 5*x
-(5*x)-3.5/(-5) = 0
-5*x-3.5/(-5) = 0
0.7-5*x = 0 // - 0.7
-5*x = -0.7 // : -5
x = -0.7/(-5)
x = 0.14
x = 0.14
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