8r+6r+13r-7r=20

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Solution for 8r+6r+13r-7r=20 equation: 



8r+6r+13r-7r=20

We move all terms to the left:

8r+6r+13r-7r-(20)=0

We add all the numbers together, and all the variables

20r-20=0

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

20r=20

r=20/20

r=1

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