1/3(5n+12)+1/3n=-1

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Solution for 1/3(5n+12)+1/3n=-1 equation: 


n in (-oo:+oo)

(1/3)*(5*n+12)+(1/3)*n = -1 // + 1

(1/3)*(5*n+12)+(1/3)*n+1 = 0

1/3*(5*n+12)+n/3+1 = 0

(1/3*3*(5*n+12))/3+n/3+(1*3)/3 = 0

1/3*3*(5*n+12)+n+1*3 = 0

6*n+3+12 = 0

6*n+15 = 0

(6*n+15)/3 = 0

(6*n+15)/3 = 0 // * 3

6*n+15 = 0

6*n+15 = 0 // - 15

6*n = -15 // : 6

n = -15/6

n = -5/2

n = -5/2

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