2x+20=-2x-20

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Solution for 2x+20=-2x-20 equation: 



2x+20=-2x-20

We move all terms to the left:

2x+20-(-2x-20)=0

We get rid of parentheses

2x+2x+20+20=0

We add all the numbers together, and all the variables

4x+40=0

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

4x=-40

x=-40/4

x=-10

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