18m+15=-21

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Solution for 18m+15=-21 equation: 



18m+15=-21

We move all terms to the left:

18m+15-(-21)=0

We add all the numbers together, and all the variables

18m+36=0

We move all terms containing m to the left, all other terms to the right

18m=-36

m=-36/18

m=-2

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