On Saturday, Joelle, Abi, Fanny and Hilda spent a total of $142. On Sunday, Joelle spent twice of what she spent on Saturday, Abi spent the same as what she spent on Saturday, Fanny spent $19 less than what she spent on Saturday, and Hilda spent $7 more than what she spent on Saturday. All of them spent an equal amount on Sunday. How much did Joelle and Hilda spend altogether on Saturday?
| |
Joelle |
Abi |
Fanny |
Hilda |
Total |
| Before |
1 u |
3 u |
3 u + $19 |
3 u - $7 |
$142 |
| Change |
x 3 |
|
- $19 |
+ $7 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Saturday
= 1 u + 3 u + 3 u + 19 + 3 u - 7
= 10 u + 19 - 7
= 10 u + 12
10 u + 12 = 142
10 u = 142 - 12
10 u = 130
1 u = 130 ÷ 10 = 13
Total amount that Joelle and Hilda spent on Saturday
= 1 u + 3 u - 7
= 4 u - 7
= 4 x 13 - 7
= 52 - 7
= $45
Answer(s): $45
