20+x=-3x

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Solution for 20+x=-3x equation: 



20+x=-3x

We move all terms to the left:

20+x-(-3x)=0

We get rid of parentheses

x+3x+20=0

We add all the numbers together, and all the variables

4x+20=0

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

4x=-20

x=-20/4

x=-5

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