Mrs Chiam baked 348 more wafers than Risa. After Mrs Chiam sold 164 of her wafers, she had 3 times as many wafers as Risa.
- How many wafers did Risa bake?
- How many wafers did Mrs Chiam bake?
| |
Risa |
Mrs Chiam |
| Before |
1 u |
1 u + 348 |
| Change |
|
- 164 |
| After |
1 u |
1 u + 184 |
(a)
After
Number of wafers that Risa had = 1 u
Number of wafers that Mrs Chiam had = 3 x 1 u = 3 u
Before
Number of wafers that Risa baked = 1 u
Number of wafers that Mrs Chiam baked = 1 u + 348
3 u = 1 u + 348 - 164
3 u - 1 u = 184
2 u = 184
1 u = 184 ÷ 2 = 92
Number of wafers that Risa baked
= 1 u
= 92
(b)
Number of wafers that Mrs Chiam baked
= 1 u + 348
= 92 + 348
= 440
Answer(s): (a) 92; (b) 440
