8r+9=131

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Solution for 8r+9=131 equation: 



8r+9=131

We move all terms to the left:

8r+9-(131)=0

We add all the numbers together, and all the variables

8r-122=0

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

8r=122

r=122/8

r=15+1/4

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