8r+7=12+7r

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Solution for 8r+7=12+7r equation: 



8r+7=12+7r

We move all terms to the left:

8r+7-(12+7r)=0

We add all the numbers together, and all the variables

8r-(7r+12)+7=0

We get rid of parentheses

8r-7r-12+7=0

We add all the numbers together, and all the variables

r-5=0

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

r=5

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