x-21=5-x

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Solution for x-21=5-x equation: 



x-21=5-x

We move all terms to the left:

x-21-(5-x)=0

We add all the numbers together, and all the variables

x-(-1x+5)-21=0

We get rid of parentheses

x+1x-5-21=0

We add all the numbers together, and all the variables

2x-26=0

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

2x=26

x=26/2

x=13

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