f/7=-3

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Solution for f/7=-3 equation: 


f in (-oo:+oo)

f/7 = -3 // + 3

f/7+3 = 0

1/7*f+3 = 0 // - 3

1/7*f = -3 // : 1/7

f = -3/1/7

f = -21

f = -21

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