2x+9=-2x-11

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Solution for 2x+9=-2x-11 equation: 



2x+9=-2x-11

We move all terms to the left:

2x+9-(-2x-11)=0

We get rid of parentheses

2x+2x+11+9=0

We add all the numbers together, and all the variables

4x+20=0

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

4x=-20

x=-20/4

x=-5

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