7r+23=15r-9

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Solution for 7r+23=15r-9 equation: 



7r+23=15r-9

We move all terms to the left:

7r+23-(15r-9)=0

We get rid of parentheses

7r-15r+9+23=0

We add all the numbers together, and all the variables

-8r+32=0

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

-8r=-32

r=-32/-8

r=+4

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