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

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


x in (-oo:+oo)

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

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

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

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

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

6*x+3+12 = 0

6*x+15 = 0

(6*x+15)/3 = 0

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

6*x+15 = 0

6*x+15 = 0 // - 15

6*x = -15 // : 6

x = -15/6

x = -5/2

x = -5/2

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