PSLE At a sale, Tim bought 9 cups of the same kind. His cousin bought 5 such cups. She also bought 4 mugs at $7.60 each. Altogether, she spent $5.60 more than Tim. What was the total amount of money Tim and his cousin spent?
|
Tim |
His cousin |
Items bought
|
9 cups
|
5 cups + 4 mugs = 5 cups + 30.40 |
Comparing the amounts paid |
|
$5.60 more |
Amount that his cousin spent on 4 mugs
= 4 x 7.60
= $30.40
Let the cost of 1 cup be 1 C.
If Tim's cousin spent $5.60 less, each would pay the same amount.
9 C + 5.60 = 5 C + 30.40 - 5.60
9 C - 5 C = 30.40 - 5.60
4 C = 24.80
1 C = 24.80 ÷ 4 = 6.20
Total amount that Tim and his cousin spent
= 9 C + 5 C + 30.40
= 14 C + 30.40
= 14 x 6.20 + 30.40
= 86.80 + 30.40
= $117.20
Answer(s): $117.20