-21m-9=90

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Solution for -21m-9=90 equation: 



-21m-9=90

We move all terms to the left:

-21m-9-(90)=0

We add all the numbers together, and all the variables

-21m-99=0

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

-21m=99

m=99/-21

m=-4+5/7

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