Tommy and Daniel were given some allowances each. If Tommy spent $23 each day and Daniel spent $46 each day, Tommy would still have $1067 left when Daniel spent all his allowance. If Tommy spent $46 each day and Daniel spent $23 each day, Tommy would still have $32 left when Daniel spent all his allowance.
- How much allowance did Tommy receive?
- How much allowance did Daniel receive?
|
Case 1 |
Case 2 |
|
Tommy |
Daniel |
Tommy |
Daniel |
Before |
1 u + 1067 |
2 u |
2 p + 32 |
1 p |
Change |
- 1 u |
- 2 u |
- 2 p |
- 1 p |
After |
1067 |
0 |
32 |
0 |
(a)
Simplify the ratio.
23 : 46 = 1 : 2
The allowance that Daniel had at first is the same for Case 1 and Case 2.
1 p = 2 u
2 p = 4 u
The allowance that Tommy had at first is the same for Case 1 and Case 2.
4 u + 32 = 1 u + 1067
4 u - 1 u = 1067 - 32
3 u = 1035
1 u = 1035 ÷ 3 = 345
Allowance that Tommy received
= 1 u + 1067
= 345 + 1067
= $1412
(b)
Allowance that Daniel received
= 2 u
= 2 x 345
= $690
Answers: (a) $1412; (b) $690