Last week, Zoe had four times as much savings as Perry. This week, Perry saves $770. As a result, he now has thrice as much savings as Zoe. What was their total savings at first?
| |
Zoe |
Perry |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
|
+ $770 |
|
| After |
1x4 =
4 u |
3x4 =
12 u |
|
The amount of savings that Zoe has at first and in the end remains unchanged. Make the amount of savings that Zoe has the same. LCM of 4 and 1 is 4.
Amount that Perry saved
= 12 u - 1 u
= 11 u
11 u = 770
1 u = 770 ÷ 11 = 70
Total savings at first
= 4 u + 1 u
= 5 u
= 5 x 70
= $350
Answer(s): $350
