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let number of pens in a box be x
6x + 6 = 84
6x + 6 = 84
We can start by writing an equation based on the information given in the problem. The total number of pens in the boxes can be represented as 6x since there are 6 boxes of pens.
Additionally, there are 6 extra pens, which we can represent as + 6.
The total number of pens can be represented as 84.
Combining these equations, we have 6x + 6 = 84.
This equation can be used to find the value of "x" by solving for it.