Kathy had
411 as much money as Mary. Kathy received another $36 from her uncle and Mary received $4 from her mother. In the end, Kathy had $4 more than Mary. How much did the girls have altogether in the end?
| |
Kathy |
Mary |
| Before |
4 u |
11 u |
| Change |
+ 36 |
+ 4 |
| After |
4 u + 36 |
11 u + 4 |
If Mary received another $4 in the end, she would have the same amount of money as Kathy.
11 u + 4 + 4 = 4 u + 36
11 u + 8 = 4 u + 36
11 u - 4 u = 36 - 8
7 u = 28
1 u = 28 ÷ 7 = 4
Amount that the girls had in the end
= 4 u + 36 + 11 u + 4
= 4 u + 11 u + 36 + 4
= 15 u + 40
= 15 x 4 + 40
= $100
Answer(s): $100
