2n+9=-9

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Solution for 2n+9=-9 equation: 


n in (-oo:+oo)

2*n+9 = -9 // + 9

2*n+9+9 = 0

2*n+18 = 0 // - 18

2*n = -18 // : 2

n = -18/2

n = -9

n = -9

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