Question
Find the value of 1 unit.
  1. 4 u + 20 = 300
  2. 20 + 4 u = 300
  3. 9 u - 70 = 20
  4. 20 = 9 u - 70
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. 4 u + 20 = 300
  2. 20 + 4 u = 300
  3. 9 u - 70 = 20
  4. 20 = 9 u - 70