Question

A person spent ₹564 in buying pens and pencils if cost of each pen is ₹7 and each pencil is ₹3 and if total number of things bought was 108,how many of each type did he buy

Answer 1

Let the no of pencils be x and no of pens be y.
ATQ,
x+y=108
x=108-y
Now,
7y + 3x =564
7y + 3(108-y) = 564
Solve it.. U will get the answer....