13=4(-7-3)-2r

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Solution for 13=4(-7-3)-2r equation: 



13=4(-7-3)-2r

We move all terms to the left:

13-(4(-7-3)-2r)=0

We add all the numbers together, and all the variables

-(4(-10)-2r)+13=0



We calculate terms in parentheses: -(4(-10)-2r), so:

4(-10)-2r

determiningTheFunctionDomain
-2r+4(-10)

We add all the numbers together, and all the variables

-2r-40

Back to the equation:

-(-2r-40)



We get rid of parentheses

2r+40+13=0

We add all the numbers together, and all the variables

2r+53=0

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

2r=-53

r=-53/2

r=-26+1/2

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