Bunuel wrote:

A pen-and-pencil set costs $12, the same as when the items are bought separately. If the pen costs $11 more than the pencil, what is the cost of the pencil?

(A) $0.50

(B) $1.00

(C) $1.50

(D) $6.00

(E) $11.00

Let the cost of the pen be x and cost of the pencil be y

The equations formed from the question stem are as follows

x + y = $12

x - y = $11

Solving for x, we get x = $11.50. Now, y = $0.50

Therefore, the cost of the pencil is

$0.50(Option A)
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