Mrs Lin baked 361 more puffs than Kathy. After Mrs Lin sold 121 of her puffs, she had 5 times as many puffs as Kathy.
- How many puffs did Kathy bake?
- How many puffs did Mrs Lin bake?
| |
Kathy |
Mrs Lin |
| Before |
1 u |
1 u + 361 |
| Change |
|
- 121 |
| After |
1 u |
1 u + 240 |
(a)
After
Number of puffs that Kathy had = 1 u
Number of puffs that Mrs Lin had = 5 x 1 u = 5 u
Before
Number of puffs that Kathy baked = 1 u
Number of puffs that Mrs Lin baked = 1 u + 361
5 u = 1 u + 361 - 121
5 u - 1 u = 240
4 u = 240
1 u = 240 ÷ 4 = 60
Number of puffs that Kathy baked
= 1 u
= 60
(b)
Number of puffs that Mrs Lin baked
= 1 u + 361
= 60 + 361
= 421
Answer(s): (a) 60; (b) 421
