-3+15=4(-2r-5)

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Solution for -3+15=4(-2r-5) equation: 



-3+15=4(-2r-5)

We move all terms to the left:

-3+15-(4(-2r-5))=0

We add all the numbers together, and all the variables

-(4(-2r-5))+12=0



We calculate terms in parentheses: -(4(-2r-5)), so:

4(-2r-5)

We multiply parentheses

-8r-20

Back to the equation:

-(-8r-20)



We get rid of parentheses

8r+20+12=0

We add all the numbers together, and all the variables

8r+32=0

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

8r=-32

r=-32/8

r=-4

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