-7-8r=-9r-1

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Solution for -7-8r=-9r-1 equation: 



-7-8r=-9r-1

We move all terms to the left:

-7-8r-(-9r-1)=0

We get rid of parentheses

-8r+9r+1-7=0

We add all the numbers together, and all the variables

r-6=0

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

r=6

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