-7=-5-r

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Solution for -7=-5-r equation: 



-7=-5-r

We move all terms to the left:

-7-(-5-r)=0

We add all the numbers together, and all the variables

-(-1r-5)-7=0

We get rid of parentheses

1r+5-7=0

We add all the numbers together, and all the variables

r-2=0

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

r=2

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