9+3k+3k=81

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Solution for 9+3k+3k=81 equation: 


k in (-oo:+oo)

3*k+3*k+9 = 81 // - 81

3*k+3*k-81+9 = 0

6*k-72 = 0 // + 72

6*k = 72 // : 6

k = 72/6

k = 12

k = 12

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