-7=-7+r/3

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



-7=-7+r/3

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-r/3+7-7=0

We multiply all the terms by the denominator


-r+7*3-7*3=0

We add all the numbers together, and all the variables

-r=0

r=0/-1

r=0

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