PSLE At a sale, Pierre bought 8 cups of the same kind. His aunt bought 4 such cups. She also bought 3 bowls at $1.40 each. Altogether, she spent $18.60 less than Pierre. What was the total amount of money Pierre and his aunt spent?
|
Pierre |
His aunt |
Items bought
|
8 cups
|
4 cups + 3 bowls = 4 cups + 4.20 |
Comparing the amounts paid |
$18.60 more |
|
Amount that his aunt spent on 3 bowls
= 3 x 1.40
= $4.20
Let the cost of 1 cup be 1 C.
If Pierre spent $18.60 less, each would pay the same amount.
8 C - 18.60 = 4 C + 4.20
8 C - 4 C = 4.20 + 18.60
8 C - 4 C = 22.80
4 C = 22.80
1 C = 22.80 ÷ 4 = 5.70
Total amount that Pierre and his aunt spent
= 8 C + 4 C + 4.20
= 12 C + 4.20
= 12 x 5.70 + 4.20
= 68.40 + 4.20
= $72.60
Answer(s): $72.60