Question

Ivy’s father wanted to keep track of the gas he purchased for 3 weeks. He purchased 22.5 gallons during the first week and 19.71 gallons the second week. He forgot to write down his purchases for Week 3. He knows he purchased a total of 61.75 gallons during the 3 weeks. How much gas did Ivy’s father purchase during Week 3? gal

Answer 1

Total amount of gas purchased by Ivy's father in the first week = 22.5 gallons
total amount of gas purchased by Ivy's father in the second week = 19.71 gallons
Let us assume the amount of gas purchased by Ivy's father in the third week = x
The total quantity of gas purchased in 3 weeks by Ivy's father = 61.75 gallons
Then
22.5 + 19.71 + x = 61.75
42.21 + x = 61.75
x = 61.75 - 42.21
   = 19.54 gallons
So 19.54 gallons of gas was bought by Ivy's father in the third week

Answer 2

If you would like to know how much gas did Ivy's father purchase during the third week, you can calculate this using the following steps:

22.5 gallons + 19.71 gallons + n = 61.75 gallons
n = 61.75 - 22.5 - 19.71
n = 19.54 gallons

Result: Ivy's father purchased 19.54 gallons during the third week.