7r-140=-3r

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Solution for 7r-140=-3r equation: 



7r-140=-3r

We move all terms to the left:

7r-140-(-3r)=0

We get rid of parentheses

7r+3r-140=0

We add all the numbers together, and all the variables

10r-140=0

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

10r=140

r=140/10

r=14

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