21x+55=391

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Solution for 21x+55=391 equation: 



21x+55=391

We move all terms to the left:

21x+55-(391)=0

We add all the numbers together, and all the variables

21x-336=0

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

21x=336

x=336/21

x=16

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