Question
Find the value of 1 unit.
  1. 8 u + 80 = 400
  2. 80 + 8 u = 400
  3. 9 u - 50 = 220
  4. 220 = 9 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. 8 u + 80 = 400
  2. 80 + 8 u = 400
  3. 9 u - 50 = 220
  4. 220 = 9 u - 50