2m-15=-21

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Solution for 2m-15=-21 equation: 



2m-15=-21

We move all terms to the left:

2m-15-(-21)=0

We add all the numbers together, and all the variables

2m+6=0

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

2m=-6

m=-6/2

m=-3

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