-4r=30-9r

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Solution for -4r=30-9r equation: 



-4r=30-9r

We move all terms to the left:

-4r-(30-9r)=0

We add all the numbers together, and all the variables

-4r-(-9r+30)=0

We get rid of parentheses

-4r+9r-30=0

We add all the numbers together, and all the variables

5r-30=0

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

5r=30

r=30/5

r=6

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