Question
PSLE
A puncher costs $4 more than a folder. The total cost of 7 such punchers is $3r.
  1. Express the cost of 28 such punchers in terms of r.
  2. Express the cost of the folder in terms of r.
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

PSLE
A puncher costs $4 more than a folder. The total cost of 7 such punchers is $3r.
  1. Express the cost of 28 such punchers in terms of r.
  2. Express the cost of the folder in terms of r.