Make x x\,x the subject of the formula 1y=1x+1z\displaystyle \frac{1}{y} = \frac{1}{x} + \frac{1}{z}y1=x1+z1
52 exam-style questions on AQA GCSE Maths Rearranging Harder Formulae. Each one has a worked solution and a mark scheme showing where the marks go.