-4(2m+1)=20

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Solution for -4(2m+1)=20 equation: 



-4(2m+1)=20

We move all terms to the left:

-4(2m+1)-(20)=0

We multiply parentheses

-8m-4-20=0

We add all the numbers together, and all the variables

-8m-24=0

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

-8m=24

m=24/-8

m=-3

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