29=x+21

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Solution for 29=x+21 equation: 



29=x+21

We move all terms to the left:

29-(x+21)=0

We get rid of parentheses

-x-21+29=0

We add all the numbers together, and all the variables

-1x+8=0

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

-x=-8

x=-8/-1

x=+8

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