Answer:
21 and 7
Explanation:
(a)
to calculate the output follow the instructions from left to right, that is
9 × 2 = 18 , then 18 + 3 = 21
(b)
to calculate the input given the output
Do the reverse operations from right to left , that is
- 3 followed by ÷ 2
17 - 3 = 14 , then 14 ÷ 2 = 7