Fred had $30 more than Mary. After Mary spent
15 of her money, Fred had five times as much money as Mary. How much money did Fred have at first?
| |
Fred |
Mary |
| Before |
20 u |
5 u |
| Change |
|
- 1 u |
| After |
20 u |
4 u |
Amount that Fred had in the end
= 5 x 4 u
= 20 u
If Mary had another $30 at first, the amounts that Fred and Mary each had at first will be the same.
20 u = 5 u + 30
20 u - 5 u = 30
15 u = 30
1 u = 30 ÷ 15 = 2
Amount Fred had at first
= 20 u
= 20 x 2
= $40
Answer(s): $40
