-4(m+-9)=20

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



-4(m+-9)=20

We move all terms to the left:

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

We add all the numbers together, and all the variables

-4(m-9)-20=0

We multiply parentheses

-4m+36-20=0

We add all the numbers together, and all the variables

-4m+16=0

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

-4m=-16

m=-16/-4

m=+4

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