9x+21=42

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Solution for 9x+21=42 equation: 



9x+21=42

We move all terms to the left:

9x+21-(42)=0

We add all the numbers together, and all the variables

9x-21=0

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

9x=21

x=21/9

x=2+1/3

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