-20=-7(8+6m)-8(3-4m)

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Solution for -20=-7(8+6m)-8(3-4m) equation: 



-20=-7(8+6m)-8(3-4m)

We move all terms to the left:

-20-(-7(8+6m)-8(3-4m))=0

We add all the numbers together, and all the variables

-(-7(6m+8)-8(-4m+3))-20=0



We calculate terms in parentheses: -(-7(6m+8)-8(-4m+3)), so:

-7(6m+8)-8(-4m+3)

We multiply parentheses

-42m+32m-56-24

We add all the numbers together, and all the variables

-10m-80

Back to the equation:

-(-10m-80)



We get rid of parentheses

10m+80-20=0

We add all the numbers together, and all the variables

10m+60=0

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

10m=-60

m=-60/10

m=-6

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