Zeph and Julie share some pens.
57 of Zeph's pens is equal to
513 of Julie's pens. Given that Zeph has 18 pens less than Julie, how many pens do they have altogether?
57 of Zeph's pens = 513 of Julie's pens
Number of Zeph's pens = 7 u
Number of Julie's pens = 13 u
Number of pens that Zeph has less than Julie
= 13 u - 7 u
= 6 u
6 u = 18
1 u = 18 ÷ 6 = 3
Total number of pens
= 7 u + 13 u
= 20 u
= 20 x 3
= 60
Answer(s): 60
