-3=-3(u-6)

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Solution for -3=-3(u-6) equation: 



-3=-3(u-6)

We move all terms to the left:

-3-(-3(u-6))=0



We calculate terms in parentheses: -(-3(u-6)), so:

-3(u-6)

We multiply parentheses

-3u+18

Back to the equation:

-(-3u+18)



We get rid of parentheses

3u-18-3=0

We add all the numbers together, and all the variables

3u-21=0

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

3u=21

u=21/3

u=7

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