3r+13=1+r+6

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Solution for 3r+13=1+r+6 equation: 



3r+13=1+r+6

We move all terms to the left:

3r+13-(1+r+6)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

3r-r-7+13=0

We add all the numbers together, and all the variables

2r+6=0

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

2r=-6

r=-6/2

r=-3

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