7=3r+4r

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Solution for 7=3r+4r equation: 



7=3r+4r

We move all terms to the left:

7-(3r+4r)=0

We add all the numbers together, and all the variables

-(+7r)+7=0

We get rid of parentheses

-7r+7=0

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

-7r=-7

r=-7/-7

r=1

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