(21+2.x)-29=x+13

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Solution for (21+2.x)-29=x+13 equation: 



(21+2.x)-29=x+13

We move all terms to the left:

(21+2.x)-29-(x+13)=0

We add all the numbers together, and all the variables

(2.x+21)-(x+13)-29=0

We get rid of parentheses

2.x-x+21-13-29=0

We add all the numbers together, and all the variables

x-21=0

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

x=21

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