PSLE At a sale, Charlie bought 10 glasses of the same kind. His friend bought 8 such glasses. She also bought 3 wine glasses at $4.90 each. Altogether, she spent $4.10 less than Charlie. What was the total amount of money Charlie and his friend spent?
|
Charlie |
His friend |
Items bought
|
10 glasses
|
8 glasses + 3 wine glasses = 8 glasses + 14.70 |
Comparing the amounts paid |
$4.10 more |
|
Amount that his friend spent on 3 wine glasses
= 3 x 4.90
= $14.70
Let the cost of 1 glass be 1 G.
If Charlie spent $4.10 less, each would pay the same amount.
10 G - 4.10 = 8 G + 14.70
10 G - 8 G = 14.70 + 4.10
10 G - 8 G = 18.80
2 G = 18.80
1 G = 18.80 ÷ 2 = 9.40
Total amount that Charlie and his friend spent
= 10 G + 8 G + 14.70
= 18 G + 14.70
= 18 x 9.40 + 14.70
= 169.20 + 14.70
= $183.90
Answer(s): $183.90