X+(x-21)=34

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Solution for X+(x-21)=34 equation: 



X+(X-21)=34

We move all terms to the left:

X+(X-21)-(34)=0

We get rid of parentheses

X+X-21-34=0

We add all the numbers together, and all the variables

2X-55=0

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

2X=55

X=55/2

X=27+1/2

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