-1+9r=10r-10

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Solution for -1+9r=10r-10 equation: 



-1+9r=10r-10

We move all terms to the left:

-1+9r-(10r-10)=0

We get rid of parentheses

9r-10r+10-1=0

We add all the numbers together, and all the variables

-1r+9=0

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

-r=-9

r=-9/-1

r=+9

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