-15=-5(u+23)

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Solution for -15=-5(u+23) equation: 



-15=-5(u+23)

We move all terms to the left:

-15-(-5(u+23))=0



We calculate terms in parentheses: -(-5(u+23)), so:

-5(u+23)

We multiply parentheses

-5u-115

Back to the equation:

-(-5u-115)



We get rid of parentheses

5u+115-15=0

We add all the numbers together, and all the variables

5u+100=0

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

5u=-100

u=-100/5

u=-20

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