Irene's salary to Anna's salary is 7 : 8. If Irene spends
35 of her salary, Anna will have $3120 more than her. How much salary does Irene have?
| |
Irene |
Anna |
Comparing Irene
and Anna at first |
7x5 =
35 u |
8x5 =
40 u |
Before |
5x7 =
35 u |
|
Change |
- 3x7 =
- 21 u |
|
After |
2x7 =
14 u |
40 u |
Comparing Irene
and Anna in the end |
|
$3120 more |
Irene's salary at first is repeated. Make Irene's salary at first the same. LCM of 7 and 5 is 35.
Amount that Anna will have more than Irene in the end
= 40 u - 14 u
= 26 u
26 u = 3120
1 u = 3120 ÷ 26 = 120
Irene's salary
= 35 u
= 35 x 120
= $4200
Answer(s): $4200
