6r+7=13=7r

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Solution for 6r+7=13=7r equation: 



6r+7=13=7r

We move all terms to the left:

6r+7-(13)=0

We add all the numbers together, and all the variables

6r-6=0

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

6r=6

r=6/6

r=1

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