Manipulating Formulae/ Changing the Subject: Eduqas GCSE Higher June 2017 Paper 1 Q7

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Higher June 2017 Paper 1 Q7

7. Make \(y\) the subject of this formula. [3]

\[9x = p(8 + y) + 5\]

Mark scheme

Scheme	Marks	Comments
\(9x - 5 = p(8 + y)\) or \(9x = 8p + py + 5\)	B1	FT until 2nd error
\(\dfrac{9x - 5}{p} = 8 + y\) or \(9x - 5 - 8p = py\)	B1	FT
\(y = \dfrac{9x - 5}{p} - 8\) or \(y = \dfrac{9x - 5 - 8p}{p}\)	B1	FT Implies previous B2. Mark final answer.
	(3)