k+9=-2k-9 - solution

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

k in (-oo:+oo)

k+9 = -2*k-9 // + -2*k-9

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

k+2*k+9+9 = 0

3*k+18 = 0 // - 18

3*k = -18 // : 3

k = -18/3

k = -6

k = -6

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