7=-5u+2(u-4)

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Solution for 7=-5u+2(u-4) equation: 



7=-5u+2(u-4)

We move all terms to the left:

7-(-5u+2(u-4))=0



We calculate terms in parentheses: -(-5u+2(u-4)), so:

-5u+2(u-4)

We multiply parentheses

-5u+2u-8

We add all the numbers together, and all the variables

-3u-8

Back to the equation:

-(-3u-8)



We get rid of parentheses

3u+8+7=0

We add all the numbers together, and all the variables

3u+15=0

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

3u=-15

u=-15/3

u=-5

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