r+3r-7=4r-7

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Solution for r+3r-7=4r-7 equation: 



r+3r-7=4r-7

We move all terms to the left:

r+3r-7-(4r-7)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

4r-4r+7-7=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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