7r-(3+9r=)

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



7r-(3+9r=)

We move all terms to the left:

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



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

3+9r-()

determiningTheFunctionDomain
9r+3-()

We add all the numbers together, and all the variables

9r

Back to the equation:

-(9r)



We add all the numbers together, and all the variables

-2r=0

r=0/-2

r=0

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