Jaslyn, Tiffany and Nora had a total of 335 erasers. Jaslyn gave
13 of her erasers away. Nora gave away 4 times as many erasers as Jaslyn and Tiffany gave away 66 erasers. In the end, they had 169 erasers left. How many erasers did Tiffany and Nora have in total in the end?
|
Jaslyn |
Tiffany |
Nora |
Total |
Before |
3 u |
? |
? |
335 |
Change |
- 1 u |
- 66 |
- 4 u |
- 166 |
After |
2 u |
? |
169 |
Number of erasers that Nora gave away
= 4 x 1 u
= 4 u
Number of erasers given away
= 1 u + 66 + 4 u
= 5 u + 66
5 u + 66 = 335 - 169
5 u = 166 - 66
5 u = 100
1 u = 100 ÷ 5 = 20
Number of erasers that Tiffany and Nora had in the end
= 169 - 2 u
= 169 - 2 x 20
= 169 - 40
= 129
Answer(s): 129