12=2m+m+9

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Solution for 12=2m+m+9 equation: 


m in (-oo:+oo)

12 = 2*m+m+9 // - 2*m+m+9

12-(2*m)-m-9 = 0

12-2*m-m-9 = 0

3-3*m = 0 // - 3

-3*m = -3 // : -3

m = -3/(-3)

m = 1

m = 1

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