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a) Here is a number machine.
Input
9
x 2
Work out the output when the input is 9.
b) Here is the same number machine.
Input
+3
x 2
+3
Work out the input when the output is 17.
Output
C
Output
17
![A Here Is A Number Machine Input 9 X 2 Work Out The Output When The Input Is 9 B Here Is The Same Number Machine Input 3 X 2 3 Work Out The Input When The Outpu class=](https://us-static.z-dn.net/files/daa/f79aaa3e714a1ade5787899c2064cbf2.png)