3r-7r=7-5r

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Solution for 3r-7r=7-5r equation: 



3r-7r=7-5r

We move all terms to the left:

3r-7r-(7-5r)=0

We add all the numbers together, and all the variables

3r-7r-(-5r+7)=0

We add all the numbers together, and all the variables

-4r-(-5r+7)=0

We get rid of parentheses

-4r+5r-7=0

We add all the numbers together, and all the variables

r-7=0

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

r=7

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