Make b b\,b the subject of the formula 1a=1b+1c\displaystyle \frac{1}{a} = \frac{1}{b} + \frac{1}{c}a1=b1+c1
Practise Edexcel IGCSE Maths Rearranging Harder Formulae with exam-style questions for IGCSE Maths. 13 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 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.