Irene and Billy went shopping with a total of $121. After Irene spent
25 of her money and Billy spent
12 of his money, they each had an equal amount of money left. How much money did they spend altogether?
| |
Irene |
Billy |
Total |
Before |
5 u |
2x3 =
6 u |
$121 |
Change |
- 2 u |
- 1x3 =
- 3 u |
|
After |
3 u |
1x3 =
3 u |
|
The amount that Irene and Billy each had in the end is the same. Make the amount that each had in the end the same. LCM of 3 and 1 is 3.
Total amount that Irene and Billy had at first
= 5 u + 6 u
= 11 u
11 u = 121
1 u = 121 ÷ 11 = 11
Total amount that Irene and Billy spent
= 2 u + 3 u
= 5 u
= 5 x 11
= $55
Answer(s): $55
