Question
Find the value of 1 unit.
  1. 3 u + 90 = 270
  2. 90 + 3 u = 270
  3. 4 u - 20 = 220
  4. 220 = 4 u - 20
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 + 90 = 270
  2. 90 + 3 u = 270
  3. 4 u - 20 = 220
  4. 220 = 4 u - 20