Question
6 C + 3 D = 30
7 C + 4 D = 37

Fill in the blanks.
  1. 1 C + 1 D = _____
  2. 1 C = _____
  3. 1 D = _____
3 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 = 30
7 C + 4 D = 37

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