Last week, Betty had thrice as much savings as Cole. This week, Cole saves $330. As a result, he now has four times as much savings as Betty. What is their total savings now?
| |
Betty |
Cole |
Total |
| Before |
3 u |
1 u |
|
| Change |
|
+ $330 |
|
| After |
1x3 =
3 u |
4x3 =
12 u |
15 u |
The amount of savings that Betty has at first and in the end remains unchanged. Make the amount of savings that Betty has the same. LCM of 3 and 1 is 3.
Amount that Cole saved
= 12 u - 1 u
= 11 u
11 u = 330
1 u = 330 ÷ 11 = 30
Total savings now
= 3 u + 12 u
= 15 u
= 15 x 30
= $450
Answer(s): $450
