31x-21=9

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Solution for 31x-21=9 equation: 



31x-21=9

We move all terms to the left:

31x-21-(9)=0

We add all the numbers together, and all the variables

31x-30=0

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

31x=30

x=30/31

x=30/31

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