-20=x+4x

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Solution for -20=x+4x equation: 



-20=x+4x

We move all terms to the left:

-20-(x+4x)=0

We add all the numbers together, and all the variables

-(+5x)-20=0

We get rid of parentheses

-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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