-k+9-2k=15

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Solution for -k+9-2k=15 equation: 


k in (-oo:+oo)

9-k-(2*k) = 15 // - 15

9-k-(2*k)-15 = 0

9-k-2*k-15 = 0

-3*k-6 = 0 // + 6

-3*k = 6 // : -3

k = 6/(-3)

k = -2

k = -2

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