81r=(9r*3)+7

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Solution for 81r=(9r*3)+7 equation: 



81r=(9r*3)+7

We move all terms to the left:

81r-((9r*3)+7)=0

We add all the numbers together, and all the variables

81r-((+9r*3)+7)=0



We calculate terms in parentheses: -((+9r*3)+7), so:

(+9r*3)+7

We get rid of parentheses

9r*3+7

Wy multiply elements

27r+7

Back to the equation:

-(27r+7)



We get rid of parentheses

81r-27r-7=0

We add all the numbers together, and all the variables

54r-7=0

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

54r=7

r=7/54

r=7/54

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