Question
PSLE
A marker costs $4 more than a glue. The total cost of 7 such markers is $4a.
  1. Express the cost of 21 such markers in terms of a.
  2. Express the cost of the glue 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 marker costs $4 more than a glue. The total cost of 7 such markers is $4a.
  1. Express the cost of 21 such markers in terms of a.
  2. Express the cost of the glue in terms of a.