Question
Find the value of 1 unit.
  1. 4 u + 70 = 310
  2. 70 + 4 u = 310
  3. 7 u - 20 = 400
  4. 400 = 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. 4 u + 70 = 310
  2. 70 + 4 u = 310
  3. 7 u - 20 = 400
  4. 400 = 7 u - 20