42+21x=441

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Solution for 42+21x=441 equation: 



42+21x=441

We move all terms to the left:

42+21x-(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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