P=4x−xyP = 4x - xyP=4x−xy
Work out the value of P P\,P when x=6x = 6x=6 and y=9y = 9y=9
Practise OCR GCSE Maths Substitution with exam-style questions for Foundation and Higher tier. 100 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.