Question
Find the value of 1 unit.
  1. 9 u + 80 = 530
  2. 80 + 9 u = 530
  3. 7 u - 90 = 540
  4. 540 = 7 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 = 530
  2. 80 + 9 u = 530
  3. 7 u - 90 = 540
  4. 540 = 7 u - 90