Make x x\,x the subject of the formula km=x+42x\displaystyle \frac{k}{m} = \frac{x+4}{2x}mk=2xx+4
Practise OCR GCSE Maths Rearranging Harder Formulae with exam-style questions for Foundation and Higher tier. 52 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.