3=3(r-7)-3

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Solution for 3=3(r-7)-3 equation: 



3=3(r-7)-3

We move all terms to the left:

3-(3(r-7)-3)=0



We calculate terms in parentheses: -(3(r-7)-3), so:

3(r-7)-3

We multiply parentheses

3r-21-3

We add all the numbers together, and all the variables

3r-24

Back to the equation:

-(3r-24)



We get rid of parentheses

-3r+24+3=0

We add all the numbers together, and all the variables

-3r+27=0

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

-3r=-27

r=-27/-3

r=+9

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