Last week, Cathy had four times as much savings as Japheth. This week, Japheth saves $420. As a result, he now has twice as much savings as Cathy. What is their total savings now?
| |
Cathy |
Japheth |
Total |
| Before |
4 u |
1 u |
|
| Change |
|
+ $420 |
|
| After |
1x4 =
4 u |
2x4 =
8 u |
12 u |
The amount of savings that Cathy has at first and in the end remains unchanged. Make the amount of savings that Cathy has the same. LCM of 4 and 1 is 4.
Amount that Japheth saved
= 8 u - 1 u
= 7 u
7 u = 420
1 u = 420 ÷ 7 = 60
Total savings now
= 4 u + 8 u
= 12 u
= 12 x 60
= $720
Answer(s): $720
