H=7a−2bH = 7a - 2bH=7a−2b
Work out the value of H H\,H when a=3a = 3a=3 and b=10b = 10b=10
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.