Question
The marker cost thrice as much as the pen. David bought 1 marker and 2 pens for $15.
  1. How much did one pen cost?
  2. How much did one marker cost?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

The marker cost thrice as much as the pen. David bought 1 marker and 2 pens for $15.
  1. How much did one pen cost?
  2. How much did one marker cost?