-20-2x+5x-21=-21-2x

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Solution for -20-2x+5x-21=-21-2x equation: 



-20-2x+5x-21=-21-2x

We move all terms to the left:

-20-2x+5x-21-(-21-2x)=0

We add all the numbers together, and all the variables

-2x+5x-(-2x-21)-20-21=0

We add all the numbers together, and all the variables

3x-(-2x-21)-41=0

We get rid of parentheses

3x+2x+21-41=0

We add all the numbers together, and all the variables

5x-20=0

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

5x=20

x=20/5

x=4

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