13r-10r-20=5

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Solution for 13r-10r-20=5 equation: 



13r-10r-20=5

We move all terms to the left:

13r-10r-20-(5)=0

We add all the numbers together, and all the variables

3r-25=0

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

3r=25

r=25/3

r=8+1/3

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