Question
Find the value of 1 unit.
  1. 9 u + 80 = 440
  2. 80 + 9 u = 440
  3. 3 u - 90 = 90
  4. 90 = 3 u - 90
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. 9 u + 80 = 440
  2. 80 + 9 u = 440
  3. 3 u - 90 = 90
  4. 90 = 3 u - 90