Mrs Ma baked 323 more wafers than Usha. After Mrs Ma sold 173 of her wafers, she had 3 times as many wafers as Usha.
- How many wafers did Usha bake?
- How many wafers did Mrs Ma bake?
| |
Usha |
Mrs Ma |
| Before |
1 u |
1 u + 323 |
| Change |
|
- 173 |
| After |
1 u |
1 u + 150 |
(a)
After
Number of wafers that Usha had = 1 u
Number of wafers that Mrs Ma had = 3 x 1 u = 3 u
Before
Number of wafers that Usha baked = 1 u
Number of wafers that Mrs Ma baked = 1 u + 323
3 u = 1 u + 323 - 173
3 u - 1 u = 150
2 u = 150
1 u = 150 ÷ 2 = 75
Number of wafers that Usha baked
= 1 u
= 75
(b)
Number of wafers that Mrs Ma baked
= 1 u + 323
= 75 + 323
= 398
Answer(s): (a) 75; (b) 398
