3r+9r+9-4=9r+3r+6-1

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Solution for 3r+9r+9-4=9r+3r+6-1 equation: 



3r+9r+9-4=9r+3r+6-1

We move all terms to the left:

3r+9r+9-4-(9r+3r+6-1)=0

We add all the numbers together, and all the variables

3r+9r-(12r+5)+9-4=0

We add all the numbers together, and all the variables

12r-(12r+5)+5=0

We get rid of parentheses

12r-12r-5+5=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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