3r+15=4(r+2)

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Solution for 3r+15=4(r+2) equation: 



3r+15=4(r+2)

We move all terms to the left:

3r+15-(4(r+2))=0



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

4(r+2)

We multiply parentheses

4r+8

Back to the equation:

-(4r+8)



We get rid of parentheses

3r-4r-8+15=0

We add all the numbers together, and all the variables

-1r+7=0

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

-r=-7

r=-7/-1

r=+7

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