Tina had six times as much money as Kimberly. After Tina spent $15 and Kimberly spent $7, Tina had $22 more than Kimberly. How much did Tina have in the end?
| |
Tina |
Kimberly |
| Before |
6 u |
1 u |
| Change |
- $15 |
- $7 |
| After |
6 u - $15 |
1 u - $7 |
Comparing Tina
and Kimberly
in the end |
$22 more |
|
If Kimberly was given another $22, the amounts that Tina and Kimberly each had in the end would be the same.
6 u - 15 = 1 u - 7 + 22
6 u - 1 u = 15 + 15
5 u = 30
1 u = 30 ÷ 5 = 6
Amount that Tina had in the end
= 6 u - 15
= 6 x 6 - 15
= 36 - 15
= $21
Answer(s): $21
