441=42+21x

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Solution for 441=42+21x equation: 



441=42+21x

We move all terms to the left:

441-(42+21x)=0

We add all the numbers together, and all the variables

-(21x+42)+441=0

We get rid of parentheses

-21x-42+441=0

We add all the numbers together, and all the variables

-21x+399=0

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

-21x=-399

x=-399/-21

x=+19

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