20m+21=381

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Solution for 20m+21=381 equation: 



20m+21=381

We move all terms to the left:

20m+21-(381)=0

We add all the numbers together, and all the variables

20m-360=0

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

20m=360

m=360/20

m=18

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