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x in (-oo:+oo)
4/3-7 = (115/3)*x // - (115/3)*x
4/3-((115/3)*x)-7 = 0
(-115/3)*x+4/3-7 = 0
-115/3*x-17/3 = 0 // + 17/3
-115/3*x = 17/3 // : -115/3
x = 17/3/(-115/3)
x = -17/115
x = -17/115
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