5/7k+9=78/7

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Solution for 5/7k+9=78/7 equation: 


k in (-oo:+oo)

(5/7)*k+9 = 78/7 // - 78/7

(5/7)*k-(78/7)+9 = 0

(5/7)*k-78/7+9 = 0

5/7*k-15/7 = 0 // + 15/7

5/7*k = 15/7 // : 5/7

k = 15/7/5/7

k = 3

k = 3

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