30=12-6r

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Solution for 30=12-6r equation: 



30=12-6r

We move all terms to the left:

30-(12-6r)=0

We add all the numbers together, and all the variables

-(-6r+12)+30=0

We get rid of parentheses

6r-12+30=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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