Mrs Cheong baked 392 more puffs than Emma. After Mrs Cheong sold 149 of her puffs, she had 4 times as many puffs as Emma.
- How many puffs did Emma bake?
- How many puffs did Mrs Cheong bake?
|
Emma |
Mrs Cheong |
Before |
1 u |
1 u + 392 |
Change |
|
- 149 |
After |
1 u |
1 u + 243 |
(a)
After
Number of puffs that Emma had = 1 u
Number of puffs that Mrs Cheong had = 4 x 1 u = 4 u
Before
Number of puffs that Emma baked = 1 u
Number of puffs that Mrs Cheong baked = 1 u + 392
4 u = 1 u + 392 - 149
4 u - 1 u = 243
3 u = 243
1 u = 243 ÷ 3 = 81
Number of puffs that Emma baked
= 1 u
= 81
(b)
Number of puffs that Mrs Cheong baked
= 1 u + 392
= 81 + 392
= 473
Answer(s): (a) 81; (b) 473