-3+7r=25

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Solution for -3+7r=25 equation: 



-3+7r=25

We move all terms to the left:

-3+7r-(25)=0

We add all the numbers together, and all the variables

7r-28=0

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

7r=28

r=28/7

r=4

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