-30=12-16r

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Solution for -30=12-16r equation: 



-30=12-16r

We move all terms to the left:

-30-(12-16r)=0

We add all the numbers together, and all the variables

-(-16r+12)-30=0

We get rid of parentheses

16r-12-30=0

We add all the numbers together, and all the variables

16r-42=0

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

16r=42

r=42/16

r=2+5/8

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