420=(2r+10)

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Solution for 420=(2r+10) equation: 



420=(2r+10)

We move all terms to the left:

420-((2r+10))=0



We calculate terms in parentheses: -((2r+10)), so:

(2r+10)

We get rid of parentheses

2r+10

Back to the equation:

-(2r+10)



We get rid of parentheses

-2r-10+420=0

We add all the numbers together, and all the variables

-2r+410=0

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

-2r=-410

r=-410/-2

r=+205

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