K=x−3yK = x - 3yK=x−3y
Work out the value of K K\,K when x=10x = 10x=10 and y=−4y = -4y=−4
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.