Question
PSLE
A pencil costs $1 more than a stapler. The total cost of 7 such pencils is $2a.
  1. Express the cost of 21 such pencils in terms of a.
  2. Express the cost of the stapler in terms of a.
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

PSLE
A pencil costs $1 more than a stapler. The total cost of 7 such pencils is $2a.
  1. Express the cost of 21 such pencils in terms of a.
  2. Express the cost of the stapler in terms of a.