Make x x\,x the subject of the formula km=x+42x\displaystyle \frac{k}{m} = \frac{x+4}{2x}mk=2xx+4
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Rearranging Harder Formulae Questions
52 exam-style questions on Edexcel GCSE Maths Rearranging Harder Formulae. Each one has a worked solution and a mark scheme showing where the marks go.