12+7*r=r-6

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Solution for 12+7*r=r-6 equation: 



12+7*r=r-6

We move all terms to the left:

12+7*r-(r-6)=0

We add all the numbers together, and all the variables

7r-(r-6)+12=0

We get rid of parentheses

7r-r+6+12=0

We add all the numbers together, and all the variables

6r+18=0

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

6r=-18

r=-18/6

r=-3

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