2(r+9)+4r=-2(r-5)

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Solution for 2(r+9)+4r=-2(r-5) equation: 



2(r+9)+4r=-2(r-5)

We move all terms to the left:

2(r+9)+4r-(-2(r-5))=0

We add all the numbers together, and all the variables

4r+2(r+9)-(-2(r-5))=0

We multiply parentheses

4r+2r-(-2(r-5))+18=0



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

-2(r-5)

We multiply parentheses

-2r+10

Back to the equation:

-(-2r+10)



We add all the numbers together, and all the variables

6r-(-2r+10)+18=0

We get rid of parentheses

6r+2r-10+18=0

We add all the numbers together, and all the variables

8r+8=0

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

8r=-8

r=-8/8

r=-1

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