-20=-7u+3(u-8)

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Solution for -20=-7u+3(u-8) equation: 



-20=-7u+3(u-8)

We move all terms to the left:

-20-(-7u+3(u-8))=0



We calculate terms in parentheses: -(-7u+3(u-8)), so:

-7u+3(u-8)

We multiply parentheses

-7u+3u-24

We add all the numbers together, and all the variables

-4u-24

Back to the equation:

-(-4u-24)



We get rid of parentheses

4u+24-20=0

We add all the numbers together, and all the variables

4u+4=0

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

4u=-4

u=-4/4

u=-1

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