PSLE At a sale, Tim bought 10 glasses of the same kind. His aunt bought 6 such glasses. She also bought 3 mugs at $5.70 each. Altogether, she spent $6.50 less than Tim. What was the total amount of money Tim and his aunt spent?
|
Tim |
His aunt |
Items bought
|
10 glasses
|
6 glasses + 3 mugs = 6 glasses + 17.10 |
Comparing the amounts paid |
$6.50 more |
|
Amount that his aunt spent on 3 mugs
= 3 x 5.70
= $17.10
Let the cost of 1 glass be 1 G.
If Tim spent $6.50 less, each would pay the same amount.
10 G - 6.50 = 6 G + 17.10
10 G - 6 G = 17.10 + 6.50
10 G - 6 G = 23.60
4 G = 23.60
1 G = 23.60 ÷ 4 = 5.90
Total amount that Tim and his aunt spent
= 10 G + 6 G + 17.10
= 16 G + 17.10
= 16 x 5.90 + 17.10
= 94.40 + 17.10
= $111.50
Answer(s): $111.50