Question
Find the value of 1 unit.
  1. 7 u + 40 = 390
  2. 40 + 7 u = 390
  3. 7 u - 30 = 110
  4. 110 = 7 u - 30
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 + 40 = 390
  2. 40 + 7 u = 390
  3. 7 u - 30 = 110
  4. 110 = 7 u - 30