r+2(r-3)+7=13

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Solution for r+2(r-3)+7=13 equation: 



r+2(r-3)+7=13

We move all terms to the left:

r+2(r-3)+7-(13)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

r+2r-6-6=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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