Question
PSLE
A pen costs $3 less than a stapler. The total cost of 7 such pens is $5j.
  1. Express the cost of 21 such pens in terms of j.
  2. Express the cost of the stapler in terms of j.
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 $3 less than a stapler. The total cost of 7 such pens is $5j.
  1. Express the cost of 21 such pens in terms of j.
  2. Express the cost of the stapler in terms of j.