15-12=(15-6r)+2r

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Solution for 15-12=(15-6r)+2r equation: 



15-12=(15-6r)+2r

We move all terms to the left:

15-12-((15-6r)+2r)=0

We add all the numbers together, and all the variables

-((-6r+15)+2r)+15-12=0

We add all the numbers together, and all the variables

-((-6r+15)+2r)+3=0



We calculate terms in parentheses: -((-6r+15)+2r), so:

(-6r+15)+2r

We add all the numbers together, and all the variables

2r+(-6r+15)

We get rid of parentheses

2r-6r+15

We add all the numbers together, and all the variables

-4r+15

Back to the equation:

-(-4r+15)



We get rid of parentheses

4r-15+3=0

We add all the numbers together, and all the variables

4r-12=0

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

4r=12

r=12/4

r=3

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