2x+20=-2x-21

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Solution for 2x+20=-2x-21 equation: 



2x+20=-2x-21

We move all terms to the left:

2x+20-(-2x-21)=0

We get rid of parentheses

2x+2x+21+20=0

We add all the numbers together, and all the variables

4x+41=0

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

4x=-41

x=-41/4

x=-10+1/4

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