1/3(m+21)+2/3m=-2

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Solution for 1/3(m+21)+2/3m=-2 equation: 


m in (-oo:+oo)

(1/3)*(m+21)+(2/3)*m = -2 // + 2

(1/3)*(m+21)+(2/3)*m+2 = 0

1/3*(m+21)+(2*m)/3+2 = 0

(1/3*3*(m+21))/3+(2*m)/3+(2*3)/3 = 0

1/3*3*(m+21)+2*m+2*3 = 0

3*m+6+21 = 0

3*m+27 = 0

(3*m+27)/3 = 0

(3*m+27)/3 = 0 // * 3

3*m+27 = 0

3*m+27 = 0 // - 27

3*m = -27 // : 3

m = -27/3

m = -9

m = -9

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