f/-2-9=13

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Solution for f/-2-9=13 equation: 


f in (-oo:+oo)

f/(-2)-9 = 13 // - 13

f/(-2)-13-9 = 0

-1/2*f-22 = 0 // + 22

-1/2*f = 22 // : -1/2

f = 22/(-1/2)

f = -44

f = -44

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