Question
Find the value of 1 unit.
  1. 2 u + 20 = 40
  2. 20 + 2 u = 40
  3. 9 u - 10 = 800
  4. 800 = 9 u - 10
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

(c)

Click button first when a symbol is required. X

(d)

Click button first when a symbol is required. X

Find the value of 1 unit.
  1. 2 u + 20 = 40
  2. 20 + 2 u = 40
  3. 9 u - 10 = 800
  4. 800 = 9 u - 10