10=10(2r-9)

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Solution for 10=10(2r-9) equation: 



10=10(2r-9)

We move all terms to the left:

10-(10(2r-9))=0



We calculate terms in parentheses: -(10(2r-9)), so:

10(2r-9)

We multiply parentheses

20r-90

Back to the equation:

-(20r-90)



We get rid of parentheses

-20r+90+10=0

We add all the numbers together, and all the variables

-20r+100=0

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

-20r=-100

r=-100/-20

r=+5

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