Mrs Tay baked 496 more cupcakes than Barbara. After Mrs Tay sold 190 of her cupcakes, she had 3 times as many cupcakes as Barbara.
- How many cupcakes did Barbara bake?
- How many cupcakes did Mrs Tay bake?
| |
Barbara |
Mrs Tay |
| Before |
1 u |
1 u + 496 |
| Change |
|
- 190 |
| After |
1 u |
1 u + 306 |
(a)
After
Number of cupcakes that Barbara had = 1 u
Number of cupcakes that Mrs Tay had = 3 x 1 u = 3 u
Before
Number of cupcakes that Barbara baked = 1 u
Number of cupcakes that Mrs Tay baked = 1 u + 496
3 u = 1 u + 496 - 190
3 u - 1 u = 306
2 u = 306
1 u = 306 ÷ 2 = 153
Number of cupcakes that Barbara baked
= 1 u
= 153
(b)
Number of cupcakes that Mrs Tay baked
= 1 u + 496
= 153 + 496
= 649
Answer(s): (a) 153; (b) 649
