10r+20=5r+30

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Solution for 10r+20=5r+30 equation: 



10r+20=5r+30

We move all terms to the left:

10r+20-(5r+30)=0

We get rid of parentheses

10r-5r-30+20=0

We add all the numbers together, and all the variables

5r-10=0

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

5r=10

r=10/5

r=2

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