7r-7=-315

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Solution for 7r-7=-315 equation: 



7r-7=-315

We move all terms to the left:

7r-7-(-315)=0

We add all the numbers together, and all the variables

7r+308=0

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

7r=-308

r=-308/7

r=-44

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