-20=-x-4

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Solution for -20=-x-4 equation: 



-20=-x-4

We move all terms to the left:

-20-(-x-4)=0

We add all the numbers together, and all the variables

-(-1x-4)-20=0

We get rid of parentheses

1x+4-20=0

We add all the numbers together, and all the variables

x-16=0

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

x=16

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