PSLE At a sale, Gabriel bought 11 mugs of the same kind. His friend bought 7 such mugs. She also bought 5 glasses at $6.10 each. Altogether, she spent $3.90 less than Gabriel. What was the total amount of money Gabriel and his friend spent?
|
Gabriel |
His friend |
Items bought
|
11 mugs
|
7 mugs + 5 glasses = 7 mugs + 30.50 |
Comparing the amounts paid |
$3.90 more |
|
Amount that his friend spent on 5 glasses
= 5 x 6.10
= $30.50
Let the cost of 1 mug be 1 M.
If Gabriel spent $3.90 less, each would pay the same amount.
11 M - 3.90 = 7 M + 30.50
11 M - 7 M = 30.50 + 3.90
11 M - 7 M = 34.40
4 M = 34.40
1 M = 34.40 ÷ 4 = 8.60
Total amount that Gabriel and his friend spent
= 11 M + 7 M + 30.50
= 18 M + 30.50
= 18 x 8.60 + 30.50
= 154.80 + 30.50
= $185.30
Answer(s): $185.30