Luis bought 50 more pens than Bobby and Bobby bought 11 pens more than Julie. The total number of pens Luis and Bobby bought was 4 times the number of pens Julie bought.
- How many pens does Luis need to give Bobby so that they have the same number of pens?
- How many pens did all three of them have altogether?
Luis |
Bobby |
Julie |
1 u + 11 + 50 |
1 u + 11 |
1 u |
4 u |
1 u |
(a)
Number of pens that Luis needs to give Bobby so that they have same number of pens
= 50 ÷ 2
= 25
(b)
Total number of pens that Luis and Bobby had
= 1 u + 11 + 50 + 1 u + 11
= 1 u + 1 u + 11 + 50 + 11
= 2 u + 72
4 u = 2 u + 72
4 u - 2 u = 72
2 u = 72
1 u = 72 ÷ 2 = 36
Total number of pens that all three of them had
= 4 u + 1 u
= 5 u
= 5 x 36
= 180
Answer(s): (a) 25; (b) 180