M=p−5qM = p - 5qM=p−5q
Work out the value of M M\,M when p=18p = 18p=18 and q=−2q = -2q=−2
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.