-18r+13=-7-16r

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Solution for -18r+13=-7-16r equation: 



-18r+13=-7-16r

We move all terms to the left:

-18r+13-(-7-16r)=0

We add all the numbers together, and all the variables

-18r-(-16r-7)+13=0

We get rid of parentheses

-18r+16r+7+13=0

We add all the numbers together, and all the variables

-2r+20=0

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

-2r=-20

r=-20/-2

r=+10

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