8r-8=9-9r

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



8r-8=9-9r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

8r+9r-9-8=0

We add all the numbers together, and all the variables

17r-17=0

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

17r=17

r=17/17

r=1

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