-100=-4(5+5m)

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Solution for -100=-4(5+5m) equation: 



-100=-4(5+5m)

We move all terms to the left:

-100-(-4(5+5m))=0

We add all the numbers together, and all the variables

-(-4(5m+5))-100=0



We calculate terms in parentheses: -(-4(5m+5)), so:

-4(5m+5)

We multiply parentheses

-20m-20

Back to the equation:

-(-20m-20)



We get rid of parentheses

20m+20-100=0

We add all the numbers together, and all the variables

20m-80=0

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

20m=80

m=80/20

m=4

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