Question
Find the value of 1 unit.
  1. 3 u + 20 = 50
  2. 20 + 3 u = 50
  3. 7 u - 70 = 280
  4. 280 = 7 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. 3 u + 20 = 50
  2. 20 + 3 u = 50
  3. 7 u - 70 = 280
  4. 280 = 7 u - 70