Justin and Andy have a total of $372. If Andy gives Justin $28, Justin will have thrice as much money as Andy. How much money has each of them at first?
- Andy
- Justin
|
Justin |
Andy |
Total |
Before |
3 u - $28 |
1 u + $28 |
$372 |
Change |
+ $28 |
- $28 |
|
After |
3 u |
1 u |
$372 |
(a)
Total amount that Justin and Andy have in the end
= 1 u + 3 u
= 4 u
4 u = 372
1 u = 372 ÷ 4 = 93
Amount that Andy has at first
= 1 u + 28
= 93 + 28
= $121
(b)
Amount that Justin has at first
= 372 - 121
= $251
Answer(s): (a) $121; (b) $251