Question
Find the value of 1 unit.
  1. 7 u + 20 = 90
  2. 20 + 7 u = 90
  3. 5 u - 50 = 150
  4. 150 = 5 u - 50
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. 7 u + 20 = 90
  2. 20 + 7 u = 90
  3. 5 u - 50 = 150
  4. 150 = 5 u - 50