1/2f=20

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Solution for 1/2f=20 equation: 


f in (-oo:+oo)

(1/2)*f = 20 // - 20

(1/2)*f-20 = 0

1/2*f-20 = 0 // + 20

1/2*f = 20 // : 1/2

f = 20/1/2

f = 40

f = 40

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