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x in (-oo:+oo)
-3.92 = x/7+14 // - x/7+14
-(x/7)-14-3.92 = 0
-1/7*x-17.92 = 0 // + 17.92
-1/7*x = 17.92 // : -1/7
x = 17.92/(-1/7)
x = -125.44000251
x = -125.44000251
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