2/7f-9/7=5/7

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Solution for 2/7f-9/7=5/7 equation: 


f in (-oo:+oo)

(2/7)*f-(9/7) = 5/7 // - 5/7

(2/7)*f-(9/7)-(5/7) = 0

(2/7)*f-9/7-5/7 = 0

2/7*f-2 = 0 // + 2

2/7*f = 2 // : 2/7

f = 2/2/7

f = 7

f = 7

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