x+21=5x+57

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Solution for x+21=5x+57 equation: 



x+21=5x+57

We move all terms to the left:

x+21-(5x+57)=0

We get rid of parentheses

x-5x-57+21=0

We add all the numbers together, and all the variables

-4x-36=0

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

-4x=36

x=36/-4

x=-9

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