-6-k+6k=-21

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Solution for -6-k+6k=-21 equation: 


k in (-oo:+oo)

6*k-k-6 = -21 // + 21

6*k-k-6+21 = 0

5*k+15 = 0 // - 15

5*k = -15 // : 5

k = -15/5

k = -3

k = -3

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