15r+8=11r-20=

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Solution for 15r+8=11r-20= equation: 



15r+8=11r-20=

We move all terms to the left:

15r+8-(11r-20)=0

We get rid of parentheses

15r-11r+20+8=0

We add all the numbers together, and all the variables

4r+28=0

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

4r=-28

r=-28/4

r=-7

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