Oscar had $33 more than Abi. After Abi spent
13 of her money, Oscar had thrice as much money as Abi. How much money did Oscar have at first?
| |
Oscar |
Abi |
| Before |
6 u |
3 u |
| Change |
|
- 1 u |
| After |
6 u |
2 u |
Amount that Oscar had in the end
= 3 x 2 u
= 6 u
If Abi had another $33 at first, the amounts that Oscar and Abi each had at first will be the same.
6 u = 3 u + 33
6 u - 3 u = 33
3 u = 33
1 u = 33 ÷ 3 = 11
Amount Oscar had at first
= 6 u
= 6 x 11
= $66
Answer(s): $66
