Howard had
79 as many erasers as Tammy. After Howard gave away 51 erasers, he had 71 less erasers than Tammy. How many erasers did Tammy have?
| |
Howard |
Tammy |
| Before |
7 u |
9 u |
| Change |
- 51 |
|
| After |
7 u - 51 |
9 u |
Tammy had 71 more erasers than Howard in the end. So, if Howard had another 71 erasers, he would have the same number of erasers as Tammy.
9 u = 7 u - 51 + 71
9 u - 7 u = 71 - 51
2 u = 20
1 u = 20 ÷ 2 = 10
Number of erasers that Tammy had at first
= 9 u
= 9 x 10
= 90
Answer: 90
