-8-9=10-12r

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Solution for -8-9=10-12r equation: 



-8-9=10-12r

We move all terms to the left:

-8-9-(10-12r)=0

We add all the numbers together, and all the variables

-(-12r+10)-8-9=0

We add all the numbers together, and all the variables

-(-12r+10)-17=0

We get rid of parentheses

12r-10-17=0

We add all the numbers together, and all the variables

12r-27=0

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

12r=27

r=27/12

r=2+1/4

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