PSLE At a sale, Eric bought 7 mugs of the same kind. His friend bought 5 such mugs. She also bought 2 wine glasses at $6.10 each. Altogether, she spent $1.40 less than Eric. What was the total amount of money Eric and his friend spent?
|
Eric |
His friend |
Items bought
|
7 mugs
|
5 mugs + 2 wine glasses = 5 mugs + 12.20 |
Comparing the amounts paid |
$1.40 more |
|
Amount that his friend spent on 2 wine glasses
= 2 x 6.10
= $12.20
Let the cost of 1 mug be 1 M.
If Eric spent $1.40 less, each would pay the same amount.
7 M - 1.40 = 5 M + 12.20
7 M - 5 M = 12.20 + 1.40
7 M - 5 M = 13.60
2 M = 13.60
1 M = 13.60 ÷ 2 = 6.80
Total amount that Eric and his friend spent
= 7 M + 5 M + 12.20
= 12 M + 12.20
= 12 x 6.80 + 12.20
= 81.60 + 12.20
= $93.80
Answer(s): $93.80