23=7+r+3r

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Solution for 23=7+r+3r equation: 



23=7+r+3r

We move all terms to the left:

23-(7+r+3r)=0

We add all the numbers together, and all the variables

-(4r+7)+23=0

We get rid of parentheses

-4r-7+23=0

We add all the numbers together, and all the variables

-4r+16=0

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

-4r=-16

r=-16/-4

r=+4

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