Mrs Yong baked 409 more cupcakes than Abi. After Mrs Yong sold 163 of her cupcakes, she had 4 times as many cupcakes as Abi.
- How many cupcakes did Abi bake?
- How many cupcakes did Mrs Yong bake?
| |
Abi |
Mrs Yong |
| Before |
1 u |
1 u + 409 |
| Change |
|
- 163 |
| After |
1 u |
1 u + 246 |
(a)
After
Number of cupcakes that Abi had = 1 u
Number of cupcakes that Mrs Yong had = 4 x 1 u = 4 u
Before
Number of cupcakes that Abi baked = 1 u
Number of cupcakes that Mrs Yong baked = 1 u + 409
4 u = 1 u + 409 - 163
4 u - 1 u = 246
3 u = 246
1 u = 246 ÷ 3 = 82
Number of cupcakes that Abi baked
= 1 u
= 82
(b)
Number of cupcakes that Mrs Yong baked
= 1 u + 409
= 82 + 409
= 491
Answer(s): (a) 82; (b) 491
