-20=3u+4(u+2)

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Solution for -20=3u+4(u+2) equation: 



-20=3u+4(u+2)

We move all terms to the left:

-20-(3u+4(u+2))=0



We calculate terms in parentheses: -(3u+4(u+2)), so:

3u+4(u+2)

We multiply parentheses

3u+4u+8

We add all the numbers together, and all the variables

7u+8

Back to the equation:

-(7u+8)



We get rid of parentheses

-7u-8-20=0

We add all the numbers together, and all the variables

-7u-28=0

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

-7u=28

u=28/-7

u=-4

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