3x+6=21x-42

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Solution for 3x+6=21x-42 equation: 



3x+6=21x-42

We move all terms to the left:

3x+6-(21x-42)=0

We get rid of parentheses

3x-21x+42+6=0

We add all the numbers together, and all the variables

-18x+48=0

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

-18x=-48

x=-48/-18

x=2+2/3

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