15=(2+r)

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Solution for 15=(2+r) equation: 



15=(2+r)

We move all terms to the left:

15-((2+r))=0

We add all the numbers together, and all the variables

-((r+2))+15=0



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

(r+2)

We get rid of parentheses

r+2

Back to the equation:

-(r+2)



We get rid of parentheses

-r-2+15=0

We add all the numbers together, and all the variables

-1r+13=0

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

-r=-13

r=-13/-1

r=+13

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