x+(4+x)=20

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Solution for x+(4+x)=20 equation: 



x+(4+x)=20

We move all terms to the left:

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

We add all the numbers together, and all the variables

x+(x+4)-20=0

We get rid of parentheses

x+x+4-20=0

We add all the numbers together, and all the variables

2x-16=0

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

2x=16

x=16/2

x=8

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