Question
Find the value of 1 unit.
  1. 9 u + 90 = 540
  2. 90 + 9 u = 540
  3. 7 u - 20 = 330
  4. 330 = 7 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. 9 u + 90 = 540
  2. 90 + 9 u = 540
  3. 7 u - 20 = 330
  4. 330 = 7 u - 20