(81-2r)=(93-3r)

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Solution for (81-2r)=(93-3r) equation: 



(81-2r)=(93-3r)

We move all terms to the left:

(81-2r)-((93-3r))=0

We add all the numbers together, and all the variables

(-2r+81)-((-3r+93))=0

We get rid of parentheses

-2r-((-3r+93))+81=0



We calculate terms in parentheses: -((-3r+93)), so:

(-3r+93)

We get rid of parentheses

-3r+93

Back to the equation:

-(-3r+93)



We get rid of parentheses

-2r+3r-93+81=0

We add all the numbers together, and all the variables

r-12=0

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

r=12

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