Question
PSLE
A glue costs $4 less than a pen. The total cost of 7 such glues is $5e.
  1. Express the cost of 21 such glues in terms of e.
  2. Express the cost of the pen in terms of e.
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

PSLE
A glue costs $4 less than a pen. The total cost of 7 such glues is $5e.
  1. Express the cost of 21 such glues in terms of e.
  2. Express the cost of the pen in terms of e.