2+2r=9

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Solution for 2+2r=9 equation: 



2+2r=9

We move all terms to the left:

2+2r-(9)=0

We add all the numbers together, and all the variables

2r-7=0

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

2r=7

r=7/2

r=3+1/2

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