Kylie, Mary and Penelope had a total of 386 buttons. Kylie gave
13 of her buttons away. Penelope gave away 5 times as many buttons as Kylie and Mary gave away 73 buttons. In the end, they had 199 buttons left. How many buttons did Mary and Penelope have in total in the end?
|
Kylie |
Mary |
Penelope |
Total |
Before |
3 u |
? |
? |
386 |
Change |
- 1 u |
- 73 |
- 5 u |
- 187 |
After |
2 u |
? |
199 |
Number of buttons that Penelope gave away
= 5 x 1 u
= 5 u
Number of buttons given away
= 1 u + 73 + 5 u
= 6 u + 73
6 u + 73 = 386 - 199
6 u = 187 - 73
6 u = 114
1 u = 114 ÷ 6 = 19
Number of buttons that Mary and Penelope had in the end
= 199 - 2 u
= 199 - 2 x 19
= 199 - 38
= 161
Answer(s): 161