Zara has 2 times as many pens as Raeann. Raeann has
47 as many pens as Anna. If the three of them have a total of 171 pens, how many pens does Anna have?
Zara |
Raeann |
Anna |
2x4 |
1x4 |
|
|
4x1 |
7x1 |
8 u |
4 u |
7 u |
The number of pens that Raeann has is repeated. Make the number of pens that Raeann has the same. LCM of 1 and 4 is 4.
Total number of pens that the three of them have
= 8 u + 4 u + 7 u
= 19 u
19 u = 171
1 u = 171 ÷ 19 = 9
Number of pens that Anna has
= 7 u
= 7 x 9
= 63
Answer(s): 63