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Foundation June 2017 Unit 2 Q15

WJECFoundationCurrent spec2 marksFunctions

15. The diagram below shows a number machine.

Number machine: INPUT, then ADD 7, then MULTIPLY BY 3, then OUTPUT

Using the number machine, calculate:

(a) the OUTPUT when the INPUT is −2, [1]
(b) the INPUT when the OUTPUT is 36, [1]
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