PSLE At a sale, Lee bought 7 cups of the same kind. His aunt bought 5 such cups. She also bought 5 bowls at $6.90 each. Altogether, she spent $20.30 more than Lee. What was the total amount of money Lee and his aunt spent?
|
Lee |
His aunt |
Items bought
|
7 cups
|
5 cups + 5 bowls = 5 cups + 34.50 |
Comparing the amounts paid |
|
$20.30 more |
Amount that his aunt spent on 5 bowls
= 5 x 6.90
= $34.50
Let the cost of 1 cup be 1 C.
If Lee's aunt spent $20.30 less, each would pay the same amount.
7 C + 20.30 = 5 C + 34.50 - 20.30
7 C - 5 C = 34.50 - 20.30
2 C = 14.20
1 C = 14.20 ÷ 2 = 7.10
Total amount that Lee and his aunt spent
= 7 C + 5 C + 34.50
= 12 C + 34.50
= 12 x 7.10 + 34.50
= 85.20 + 34.50
= $119.70
Answer(s): $119.70