4+8r+4r=-8+9r

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Solution for 4+8r+4r=-8+9r equation: 



4+8r+4r=-8+9r

We move all terms to the left:

4+8r+4r-(-8+9r)=0

We add all the numbers together, and all the variables

8r+4r-(9r-8)+4=0

We add all the numbers together, and all the variables

12r-(9r-8)+4=0

We get rid of parentheses

12r-9r+8+4=0

We add all the numbers together, and all the variables

3r+12=0

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

3r=-12

r=-12/3

r=-4

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