Ian has four times as many erasers as Warren. Warren has 7 more erasers than Jack. They have a total of 59 erasers.
- How many erasers does Ian have?
- How many erasers does Jack have?
(a)
Number of erasers that Warren has = 1 u
Number of erasers that Jack has = 1 u - 7
Number of erasers that Ian has = 4 u
Total number of erasers
= 1 u + 1 u - 7 + 4 u
= 6 u - 7
6 u - 7 = 59
6 u = 59 + 7
6 u = 66
1 u = 66 ÷ 6 = 11
Number of erasers that Ian has
= 4 u
= 4 x 11
= 44
(b)
Number of erasers that Jack has
= 1 u - 7
= 11 - 7
= 4
Answer(s): (a) 44; (b) 4
