Question
Find the value of 1 unit.
  1. 4 u + 100 = 420
  2. 100 + 4 u = 420
  3. 3 u - 50 = 220
  4. 220 = 3 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. 4 u + 100 = 420
  2. 100 + 4 u = 420
  3. 3 u - 50 = 220
  4. 220 = 3 u - 50