Question
7 C + 4 D = 54
8 C + 5 D = 63

Fill in the blanks.
  1. 1 C = _____
  2. 1 D = _____
  3. 5 C + 5 D = _____



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

7 C + 4 D = 54
8 C + 5 D = 63

Fill in the blanks.
  1. 1 C = _____
  2. 1 D = _____
  3. 5 C + 5 D = _____