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x in (-oo:+oo)
-3/4 = x/14 // - x/14
-(x/14)-3/4 = 0
-1/14*x-3/4 = 0 // + 3/4
-1/14*x = 3/4 // : -1/14
x = 3/4/(-1/14)
x = -21/2
x = -21/2
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