2(r+5)-(9+r)=-1

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Solution for 2(r+5)-(9+r)=-1 equation: 



2(r+5)-(9+r)=-1

We move all terms to the left:

2(r+5)-(9+r)-(-1)=0

We add all the numbers together, and all the variables

2(r+5)-(r+9)-(-1)=0

We add all the numbers together, and all the variables

2(r+5)-(r+9)+1=0

We multiply parentheses

2r-(r+9)+10+1=0

We get rid of parentheses

2r-r-9+10+1=0

We add all the numbers together, and all the variables

r+2=0

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

r=-2

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