The stapler cost twice as much as the pencil. Xavier bought 1 stapler and 4 pencils for $18.
- How much did one pencil cost?
- How much did one stapler cost?
(a)
Cost of the pencil = 1 u
Cost of 4 pencils = 4 x 1 u = 4 u
Cost of the stapler = 2 x 1 u = 2 u
Total cost = 4 u + 2 u = 6 u
6 u = 18
1 u = 18 ÷ 6 = 3
Cost of 1 pencil
= 1 u
= $3
(b)
Cost of 1 stapler
= 2 u
= 2 x 3
= $6
Answer(s): (a) $3; (b)$6