2x-21=x+57=180

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Solution for 2x-21=x+57=180 equation: 



2x-21=x+57=180

We move all terms to the left:

2x-21-(x+57)=0

We get rid of parentheses

2x-x-57-21=0

We add all the numbers together, and all the variables

x-78=0

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

x=78

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