PSLE John had $20 more than Cathy at first. After John gave some of his money to Cathy, he had $42 less than Cathy. How much money did John give to Cathy?
|
John |
Cathy |
Before |
1 u + 11 + 20 = 1 u + 31 |
1 u + 11
|
Change |
- 31 |
+ 31 |
After |
1 u |
1 u + 11 + 31 = 1 u + 42 |
At first, John had $20 more than Cathy. After giving to Cathy, he had $42 less than Cathy. This means he gave Cathy more than $20.
Additional amount that John gave to Cathy
= (42 - 20) ÷ 2
= 22 ÷ 2
= $11
Total amount that John gave to Cathy
= 11 + 20
= $31
Answer(s): $31