A person spent $564 in buying pens and pencils if cost of each pen is $7 and each pencil is $3 and if the total number of things bought was 108,how many of each type did he buy
Answers
Answered by
34
Answer:
Step-by-step explanation:
Pen cost = Rs 7
Pencil cost = Rs 3
Total number of things = 108
The person spent Rs 564
Assume number of pens = x
Assume number of pencils = y
x + y = 108 ......... (1)
7x + 3y = 564 .......... (2) Multiply (1) by 7
7x + 7y = 756 ............ (3)
On subtracting (2) by (3)
7x + 7y - 7x -7y = 756 - 564
4y = 192
y = 48
x + y = 108
x + 48 = 108
x = 108 - 48
x = 60
Number of pens = 60
Number of pencils = 48
Similar questions