F/9+2=-1

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Solution for F/9+2=-1 equation: 


F in (-oo:+oo)

F/9+2 = -1 // + 1

F/9+1+2 = 0

1/9*F+3 = 0 // - 3

1/9*F = -3 // : 1/9

F = -3/1/9

F = -27

F = -27

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