3-(-4m-9)=-20

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Solution for 3-(-4m-9)=-20 equation: 



3-(-4m-9)=-20

We move all terms to the left:

3-(-4m-9)-(-20)=0

We add all the numbers together, and all the variables

-(-4m-9)+23=0

We get rid of parentheses

4m+9+23=0

We add all the numbers together, and all the variables

4m+32=0

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

4m=-32

m=-32/4

m=-8

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