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x in (-oo:+oo)
-4 = 4*x+7*x+7 // - 4*x+7*x+7
-(4*x)-(7*x)-7-4 = 0
-4*x-7*x-7-4 = 0
-11*x-11 = 0 // + 11
-11*x = 11 // : -11
x = 11/(-11)
x = -1
x = -1
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