7r+9=-8-10r

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Solution for 7r+9=-8-10r equation: 



7r+9=-8-10r

We move all terms to the left:

7r+9-(-8-10r)=0

We add all the numbers together, and all the variables

7r-(-10r-8)+9=0

We get rid of parentheses

7r+10r+8+9=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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