Question
6 C + 3 D = 45
7 C + 4 D = 54

Fill in the blanks.
  1. 1 C = _____
  2. 1 D = _____
  3. 3 C + 4 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

6 C + 3 D = 45
7 C + 4 D = 54

Fill in the blanks.
  1. 1 C = _____
  2. 1 D = _____
  3. 3 C + 4 D = _____