100=7r+2

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Solution for 100=7r+2 equation: 



100=7r+2

We move all terms to the left:

100-(7r+2)=0

We get rid of parentheses

-7r-2+100=0

We add all the numbers together, and all the variables

-7r+98=0

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

-7r=-98

r=-98/-7

r=+14

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