Question
Find the value of 1 unit.
  1. 5 u + 20 = 170
  2. 20 + 5 u = 170
  3. 9 u - 40 = 140
  4. 140 = 9 u - 40
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. 5 u + 20 = 170
  2. 20 + 5 u = 170
  3. 9 u - 40 = 140
  4. 140 = 9 u - 40