Problema Solution
Mechanical pencils cost 13 cents each and wooden pencils cost 4 cents each. If I
purchase 200 pencils for $12.23, how many of each do I purchase?
Answer provided by our tutors
let
m = the number of mechanical pencils
w = the number of wooden pencils
I purchase 200 pencils for $12.23 = 1223 cents means
m + w = 200
13m + 4w = 1223
by solving the system of equations we find
m = 47 mechanical pencils
w = 153 wooden pencils
click here to see the step by step solution of the system of equations
47 mechanical pencils and 153 wooden pencils were purchased.