Question
Find the value of 1 unit.
  1. 4 u + 40 = 440
  2. 40 + 4 u = 440
  3. 2 u - 70 = 90
  4. 90 = 2 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 + 40 = 440
  2. 40 + 4 u = 440
  3. 2 u - 70 = 90
  4. 90 = 2 u - 70