Question
Find the value of 1 unit.
  1. 7 u + 90 = 650
  2. 90 + 7 u = 650
  3. 9 u - 70 = 20
  4. 20 = 9 u - 70
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. 7 u + 90 = 650
  2. 90 + 7 u = 650
  3. 9 u - 70 = 20
  4. 20 = 9 u - 70