3x+6=213

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Solution for 3x+6=213 equation: 



3x+6=213

We move all terms to the left:

3x+6-(213)=0

We add all the numbers together, and all the variables

3x-207=0

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

3x=207

x=207/3

x=69

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