-23=-8r+9

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Solution for -23=-8r+9 equation: 



-23=-8r+9

We move all terms to the left:

-23-(-8r+9)=0

We get rid of parentheses

8r-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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