9r+9=49-r

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Solution for 9r+9=49-r equation: 



9r+9=49-r

We move all terms to the left:

9r+9-(49-r)=0

We add all the numbers together, and all the variables

9r-(-1r+49)+9=0

We get rid of parentheses

9r+1r-49+9=0

We add all the numbers together, and all the variables

10r-40=0

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

10r=40

r=40/10

r=4

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