x=20-1x

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Solution for x=20-1x equation: 



x=20-1x

We move all terms to the left:

x-(20-1x)=0

We add all the numbers together, and all the variables

x-(-1x+20)=0

We get rid of parentheses

x+1x-20=0

We add all the numbers together, and all the variables

2x-20=0

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

2x=20

x=20/2

x=10

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