6k-9=21

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Solution for 6k-9=21 equation: 


k in (-oo:+oo)

6*k-9 = 21 // - 21

6*k-21-9 = 0

6*k-30 = 0 // + 30

6*k = 30 // : 6

k = 30/6

k = 5

k = 5

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