Question
Find the value of 1 unit.
  1. 8 u + 90 = 810
  2. 90 + 8 u = 810
  3. 7 u - 20 = 190
  4. 190 = 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. 8 u + 90 = 810
  2. 90 + 8 u = 810
  3. 7 u - 20 = 190
  4. 190 = 7 u - 20