-1/4f+20.5=12.9

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Solution for -1/4f+20.5=12.9 equation: 


f in (-oo:+oo)

(-1/4)*f+20.5 = 12.9 // - 12.9

(-1/4)*f-12.9+20.5 = 0

7.6-1/4*f = 0 // - 7.6

-1/4*f = -7.6 // : -1/4

f = -7.6/(-1/4)

f = 30.4

f = 30.4

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