PSLE At a sale, Dylan bought 9 wine glasses of the same kind. His friend bought 7 such wine glasses. She also bought 5 mugs at $4.70 each. Altogether, she spent $9.90 more than Dylan. What was the total amount of money Dylan and his friend spent?
|
Dylan |
His friend |
Items bought
|
9 wine glasses
|
7 wine glasses + 5 mugs = 7 wine glasses + 23.50 |
Comparing the amounts paid |
|
$9.90 more |
Amount that his friend spent on 5 mugs
= 5 x 4.70
= $23.50
Let the cost of 1 wine glass be 1 W.
If Dylan's friend spent $9.90 less, each would pay the same amount.
9 W + 9.90 = 7 W + 23.50 - 9.90
9 W - 7 W = 23.50 - 9.90
2 W = 13.60
1 W = 13.60 ÷ 2 = 6.80
Total amount that Dylan and his friend spent
= 9 W + 7 W + 23.50
= 16 W + 23.50
= 16 x 6.80 + 23.50
= 108.80 + 23.50
= $132.30
Answer(s): $132.30