Fred had $3.20 less than Elijah. After Fred gave $3.10 to Elijah, Elijah would have thrice as much money as Fred. How much money had Elijah at first?
| |
Elijah |
Fred |
| Before |
3 u - $3.10 |
1 u + $3.10 |
| Change |
+ $3.10 |
- $3.10 |
| After |
3 u |
1 u |
Fred had $3.20 less than Elijah. If another $3.20 was given to Fred, Elijah and Fred would have the same amount at first.
3 u - 3.10 = 1 u + 3.10 + 3.20
3 u - 1 u = 3.10 + 3.20 + 3.10
2 u = 9.40
1 u = 9.40 ÷ 2 = 4.70
Amount that Elijah had at first
= 3 u - 3.10
= 3 x 4.70 + 3.10
= 14.10 + 3.10
= $17.20
Answer(s): $17.20
