4=(-3u-(-7))-8

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Solution for 4=(-3u-(-7))-8 equation: 



4=(-3u-(-7))-8

We move all terms to the left:

4-((-3u-(-7))-8)=0



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

(-3u-(-7))-8



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

-3u-(-7)

We add all the numbers together, and all the variables

-3u+7

Back to the equation:

+(-3u+7)



We get rid of parentheses

-3u+7-8

We add all the numbers together, and all the variables

-3u-1

Back to the equation:

-(-3u-1)



We get rid of parentheses

3u+1+4=0

We add all the numbers together, and all the variables

3u+5=0

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

3u=-5

u=-5/3

u=-1+2/3

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