Mrs Ong baked 429 more croissants than Emma. After Mrs Ong sold 159 of her croissants, she had 3 times as many croissants as Emma.
- How many croissants did Emma bake?
- How many croissants did Mrs Ong bake?
|
Emma |
Mrs Ong |
Before |
1 u |
1 u + 429 |
Change |
|
- 159 |
After |
1 u |
1 u + 270 |
(a)
After
Number of croissants that Emma had = 1 u
Number of croissants that Mrs Ong had = 3 x 1 u = 3 u
Before
Number of croissants that Emma baked = 1 u
Number of croissants that Mrs Ong baked = 1 u + 429
3 u = 1 u + 429 - 159
3 u - 1 u = 270
2 u = 270
1 u = 270 ÷ 2 = 135
Number of croissants that Emma baked
= 1 u
= 135
(b)
Number of croissants that Mrs Ong baked
= 1 u + 429
= 135 + 429
= 564
Answer(s): (a) 135; (b) 564