10r-10=20

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Solution for 10r-10=20 equation: 



10r-10=20

We move all terms to the left:

10r-10-(20)=0

We add all the numbers together, and all the variables

10r-30=0

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

10r=30

r=30/10

r=3

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