-13-5r=1-7r

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Solution for -13-5r=1-7r equation: 



-13-5r=1-7r

We move all terms to the left:

-13-5r-(1-7r)=0

We add all the numbers together, and all the variables

-5r-(-7r+1)-13=0

We get rid of parentheses

-5r+7r-1-13=0

We add all the numbers together, and all the variables

2r-14=0

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

2r=14

r=14/2

r=7

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