4-5m=-21

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Solution for 4-5m=-21 equation: 



4-5m=-21

We move all terms to the left:

4-5m-(-21)=0

We add all the numbers together, and all the variables

-5m+25=0

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

-5m=-25

m=-25/-5

m=+5

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