Irene spent $720 on one computer. Of the remaining salary, she spent
25 on a lamp. She had
17 of the original total left. How much was her salary?
| Computer |
Lamp |
Left |
Remaining total |
Total
|
| $720 |
2x1 |
3x1 |
5x1 |
|
| |
|
1x3 |
|
7x3 |
| 16 u |
2 u |
3 u |
|
21 u |
Fraction of the remaining salary left
= 1 -
25 =
35 35 of the remaining salary =
17 of the total salary
3x15x1 of the remaining salary =
1x37x3 of the total salary
35 of the remaining salary =
321 of the total salary
Total salary = 21 u
Amount left = 3 u
Amount spent on the lamp = 5 u - 3 u = 2 u
Amount spent on the computer = 21 u - 3 u - 2 u = 16 u
16 u = 720
1 u = 720 ÷ 16 = 45
Her salary
= 21 u
= 21 x 45
= $945
Answer(s): $945
