Question
PSLE
A pen costs $4 less than a folder. The total cost of 5 such pens is $4b.
  1. Express the cost of 20 such pens in terms of b.
  2. Express the cost of the folder in terms of b.
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

PSLE
A pen costs $4 less than a folder. The total cost of 5 such pens is $4b.
  1. Express the cost of 20 such pens in terms of b.
  2. Express the cost of the folder in terms of b.