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X in (-oo:+oo)
(X+5)/4 = -7 // + 7
(X+5)/4+7 = 0
(X+5)/4+(4*7)/4 = 0
X+4*7+5 = 0
X+33 = 0
(X+33)/4 = 0
(X+33)/4 = 0 // * 4
X+33 = 0
X+33 = 0 // - 33
X = -33
X = -33
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