Question
Find the value of 1 unit.
  1. 3 u + 90 = 390
  2. 90 + 3 u = 390
  3. 2 u - 70 = 90
  4. 90 = 2 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. 3 u + 90 = 390
  2. 90 + 3 u = 390
  3. 2 u - 70 = 90
  4. 90 = 2 u - 70