X+(x+21)+(x-54)=180

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Solution for X+(x+21)+(x-54)=180 equation: 



X+(X+21)+(X-54)=180

We move all terms to the left:

X+(X+21)+(X-54)-(180)=0

We get rid of parentheses

X+X+X+21-54-180=0

We add all the numbers together, and all the variables

3X-213=0

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

3X=213

X=213/3

X=71

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