Make x x\,x the subject of the formula x(3+a)=b(x+4)x(3 + a) = b(x + 4)x(3+a)=b(x+4). Give your answer in its simplest exact form.
215 exam-style questions on OCR GCSE Maths Rearranging Harder Formulae. Each one has a worked solution and a mark scheme showing where the marks go.