2x-9=399

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Solution for 2x-9=399 equation: 



2x-9=399

We move all terms to the left:

2x-9-(399)=0

We add all the numbers together, and all the variables

2x-408=0

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

2x=408

x=408/2

x=204

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