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X in (-oo:+oo)
1.68 = X/45 // - X/45
1.68-(X/45) = 0
1.68-1/45*X = 0 // - 1.68
-1/45*X = -1.68 // : -1/45
X = -1.68/(-1/45)
X = 75.60000756
X = 75.60000756
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