(8m-40)=4(4m+20)

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Solution for (8m-40)=4(4m+20) equation: 



(8m-40)=4(4m+20)

We move all terms to the left:

(8m-40)-(4(4m+20))=0

We get rid of parentheses

8m-(4(4m+20))-40=0



We calculate terms in parentheses: -(4(4m+20)), so:

4(4m+20)

We multiply parentheses

16m+80

Back to the equation:

-(16m+80)



We get rid of parentheses

8m-16m-80-40=0

We add all the numbers together, and all the variables

-8m-120=0

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

-8m=120

m=120/-8

m=-15

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