Emma, Betty and Joelle had a total of 202 erasers. Emma gave
18 of her erasers away. Joelle gave away 2 times as many erasers as Emma and Betty gave away 35 erasers. In the end, they had 134 erasers left. How many erasers did Betty and Joelle have in total in the end?
|
Emma |
Betty |
Joelle |
Total |
Before |
8 u |
? |
? |
202 |
Change |
- 1 u |
- 35 |
- 2 u |
- 68 |
After |
7 u |
? |
134 |
Number of erasers that Joelle gave away
= 2 x 1 u
= 2 u
Number of erasers given away
= 1 u + 35 + 2 u
= 3 u + 35
3 u + 35 = 202 - 134
3 u = 68 - 35
3 u = 33
1 u = 33 ÷ 3 = 11
Number of erasers that Betty and Joelle had in the end
= 134 - 7 u
= 134 - 7 x 11
= 134 - 77
= 57
Answer(s): 57