-40=2n+5n+9

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Solution for -40=2n+5n+9 equation: 


n in (-oo:+oo)

-40 = 2*n+5*n+9 // - 2*n+5*n+9

-(2*n)-(5*n)-40-9 = 0

-2*n-5*n-40-9 = 0

-7*n-49 = 0 // + 49

-7*n = 49 // : -7

n = 49/(-7)

n = -7

n = -7

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