Problema Solution
The school bookstore sold 8 more pencils than pens one day. The cost of a pencil is .05 and the cost of a pen is .20. If the days sales of pens and pencils totaled 8.90, how many pencils were sold?
Answer provided by our tutors
let 'x' represent the number of pens, then 'x+8' represents the number of pencils
8.90 = 0.2x + 0.05(x+8)
solving for 'x' we have x=34
34+8=42
there were 34 pens sold and 42 pencils