Henry had
79 as many erasers as Gem. After Henry bought another 9 erasers, he had 17 less erasers than Gem. How many erasers did Henry have at first?
|
Henry |
Gem |
Before |
7 u |
9 u |
Change |
+ 9 |
|
After |
7 u + 9 |
9 u |
Gem had 17 more erasers than Henry in the end. So, if Henry had another 17 erasers, he would have the same number of erasers as Gem.
9 u = 7 u + 9 + 17
9 u - 7 u = 9 + 17
2 u = 26
1 u = 26 ÷ 2 = 13
Number of erasers that Henry had at first
= 7 u
= 7 x 13
= 91
Answer: 91