Mrs Chia baked 425 more cupcakes than Betty. After Mrs Chia sold 193 of her cupcakes, she had 3 times as many cupcakes as Betty.
- How many cupcakes did Betty bake?
- How many cupcakes did Mrs Chia bake?
| |
Betty |
Mrs Chia |
| Before |
1 u |
1 u + 425 |
| Change |
|
- 193 |
| After |
1 u |
1 u + 232 |
(a)
After
Number of cupcakes that Betty had = 1 u
Number of cupcakes that Mrs Chia had = 3 x 1 u = 3 u
Before
Number of cupcakes that Betty baked = 1 u
Number of cupcakes that Mrs Chia baked = 1 u + 425
3 u = 1 u + 425 - 193
3 u - 1 u = 232
2 u = 232
1 u = 232 ÷ 2 = 116
Number of cupcakes that Betty baked
= 1 u
= 116
(b)
Number of cupcakes that Mrs Chia baked
= 1 u + 425
= 116 + 425
= 541
Answer(s): (a) 116; (b) 541
