20+13r=-16+15r

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Solution for 20+13r=-16+15r equation: 



20+13r=-16+15r

We move all terms to the left:

20+13r-(-16+15r)=0

We add all the numbers together, and all the variables

13r-(15r-16)+20=0

We get rid of parentheses

13r-15r+16+20=0

We add all the numbers together, and all the variables

-2r+36=0

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

-2r=-36

r=-36/-2

r=+18

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