PSLE At a sale, Will bought 5 glasses of the same kind. His sister bought 3 such glasses. She also bought 2 wine glasses at $1.40 each. Altogether, she spent $7.80 less than Will. What was the total amount of money Will and his sister spent?
|
Will |
His sister |
Items bought
|
5 glasses
|
3 glasses + 2 wine glasses = 3 glasses + 2.80 |
Comparing the amounts paid |
$7.80 more |
|
Amount that his sister spent on 2 wine glasses
= 2 x 1.40
= $2.80
Let the cost of 1 glass be 1 G.
If Will spent $7.80 less, each would pay the same amount.
5 G - 7.80 = 3 G + 2.80
5 G - 3 G = 2.80 + 7.80
5 G - 3 G = 10.60
2 G = 10.60
1 G = 10.60 ÷ 2 = 5.30
Total amount that Will and his sister spent
= 5 G + 3 G + 2.80
= 8 G + 2.80
= 8 x 5.30 + 2.80
= 42.40 + 2.80
= $45.20
Answer(s): $45.20