Question
Find the value of 1 unit.
  1. 7 u + 30 = 170
  2. 30 + 7 u = 170
  3. 7 u - 40 = 520
  4. 520 = 7 u - 40
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 + 30 = 170
  2. 30 + 7 u = 170
  3. 7 u - 40 = 520
  4. 520 = 7 u - 40