23=15+8(u-1)

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Solution for 23=15+8(u-1) equation: 



23=15+8(u-1)

We move all terms to the left:

23-(15+8(u-1))=0



We calculate terms in parentheses: -(15+8(u-1)), so:

15+8(u-1)

determiningTheFunctionDomain
8(u-1)+15

We multiply parentheses

8u-8+15

We add all the numbers together, and all the variables

8u+7

Back to the equation:

-(8u+7)



We get rid of parentheses

-8u-7+23=0

We add all the numbers together, and all the variables

-8u+16=0

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

-8u=-16

u=-16/-8

u=+2

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