Joelle's salary to Opal's salary is 2 : 9. If Joelle spends
47 of her salary, Opal will have $3990 more than her. How much salary does Joelle have?
| |
Joelle |
Opal |
Comparing Joelle
and Opal at first |
2x7 =
14 u |
9x7 =
63 u |
Before |
7x2 =
14 u |
|
Change |
- 4x2 =
- 8 u |
|
After |
3x2 =
6 u |
63 u |
Comparing Joelle
and Opal in the end |
|
$3990 more |
Joelle's salary at first is repeated. Make Joelle's salary at first the same. LCM of 2 and 7 is 14.
Amount that Opal will have more than Joelle in the end
= 63 u - 6 u
= 57 u
57 u = 3990
1 u = 3990 ÷ 57 = 70
Joelle's salary
= 14 u
= 14 x 70
= $980
Answer(s): $980
