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x in (-oo:+oo)
-(7*x)-4 = 7*x-116 // - 7*x-116
116-(7*x)-(7*x)-4 = 0
116-7*x-7*x-4 = 0
112-14*x = 0 // - 112
-14*x = -112 // : -14
x = -112/(-14)
x = 8
x = 8
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