Howard and David were given some allowances each. If Howard spent $27 each day and David spent $54 each day, Howard would still have $1228 left when David spent all his allowance. If Howard spent $54 each day and David spent $27 each day, Howard would still have $94 left when David spent all his allowance.
- How much allowance did Howard receive?
- How much allowance did David receive?
|
Case 1 |
Case 2 |
|
Howard |
David |
Howard |
David |
Before |
1 u + 1228 |
2 u |
2 p + 94 |
1 p |
Change |
- 1 u |
- 2 u |
- 2 p |
- 1 p |
After |
1228 |
0 |
94 |
0 |
(a)
Simplify the ratio.
27 : 54 = 1 : 2
The allowance that David had at first is the same for Case 1 and Case 2.
1 p = 2 u
2 p = 4 u
The allowance that Howard had at first is the same for Case 1 and Case 2.
4 u + 94 = 1 u + 1228
4 u - 1 u = 1228 - 94
3 u = 1134
1 u = 1134 ÷ 3 = 378
Allowance that Howard received
= 1 u + 1228
= 378 + 1228
= $1606
(b)
Allowance that David received
= 2 u
= 2 x 378
= $756
Answers: (a) $1606; (b) $756