2m+21=155

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Solution for 2m+21=155 equation: 



2m+21=155

We move all terms to the left:

2m+21-(155)=0

We add all the numbers together, and all the variables

2m-134=0

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

2m=134

m=134/2

m=67

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