Last month, Xandra had four times as much savings as Justin. This month, Justin saves $210. As a result, he now has twice as much savings as Xandra. What was their total savings at first?
| |
Xandra |
Justin |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
|
+ $210 |
|
| After |
1x4 =
4 u |
2x4 =
8 u |
|
The amount of savings that Xandra has at first and in the end remains unchanged. Make the amount of savings that Xandra has the same. LCM of 4 and 1 is 4.
Amount that Justin saved
= 8 u - 1 u
= 7 u
7 u = 210
1 u = 210 ÷ 7 = 30
Total savings at first
= 4 u + 1 u
= 5 u
= 5 x 30
= $150
Answer(s): $150
