Fred has twice as many pens as Pierre. Pierre has 7 more pens than Will. They have a total of 69 pens.
- How many pens does Fred have?
- How many pens does Will have?
(a)
Number of pens that Pierre has = 1 u
Number of pens that Will has = 1 u - 7
Number of pens that Fred has = 2 u
Total number of pens
= 1 u + 1 u - 7 + 2 u
= 4 u - 7
4 u - 7 = 69
4 u = 69 + 7
4 u = 76
1 u = 76 ÷ 4 = 19
Number of pens that Fred has
= 2 u
= 2 x 19
= 38
(b)
Number of pens that Will has
= 1 u - 7
= 19 - 7
= 12
Answer(s): (a) 38; (b) 12
