r+9+2r=4(3+2r)-3

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Solution for r+9+2r=4(3+2r)-3 equation: 



r+9+2r=4(3+2r)-3

We move all terms to the left:

r+9+2r-(4(3+2r)-3)=0

We add all the numbers together, and all the variables

r+2r-(4(2r+3)-3)+9=0

We add all the numbers together, and all the variables

3r-(4(2r+3)-3)+9=0



We calculate terms in parentheses: -(4(2r+3)-3), so:

4(2r+3)-3

We multiply parentheses

8r+12-3

We add all the numbers together, and all the variables

8r+9

Back to the equation:

-(8r+9)



We get rid of parentheses

3r-8r-9+9=0

We add all the numbers together, and all the variables

-5r=0

r=0/-5

r=0

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