r+4=-r

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Solution for r+4=-r equation: 



r+4=-r

We move all terms to the left:

r+4-(-r)=0

We add all the numbers together, and all the variables

r-(-1r)+4=0

We get rid of parentheses

r+1r+4=0

We add all the numbers together, and all the variables

2r+4=0

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

2r=-4

r=-4/2

r=-2

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