Question 629587
If 3 pencils cost $0.10 then a dozen(12) pencils must cost $0.40. So now we can subtract that from $3.34 to find the cost of 6 pens.  $3.34-$0.40= $2.94, and that is the value of 6 pens. So we should divide by 6 to get the value of 1 pen.  $2.94/6= $0.49
So the cost of one pen is 49 cents.