13-r+20=-18+16r

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Solution for 13-r+20=-18+16r equation: 



13-r+20=-18+16r

We move all terms to the left:

13-r+20-(-18+16r)=0

We add all the numbers together, and all the variables

-r-(16r-18)+13+20=0

We add all the numbers together, and all the variables

-1r-(16r-18)+33=0

We get rid of parentheses

-1r-16r+18+33=0

We add all the numbers together, and all the variables

-17r+51=0

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

-17r=-51

r=-51/-17

r=+3

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