23=8+r

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Solution for 23=8+r equation: 



23=8+r

We move all terms to the left:

23-(8+r)=0

We add all the numbers together, and all the variables

-(r+8)+23=0

We get rid of parentheses

-r-8+23=0

We add all the numbers together, and all the variables

-1r+15=0

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

-r=-15

r=-15/-1

r=+15

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