y=4x+6zy = 4x + 6zy=4x+6z
x=7x = 7x=7 z=−3z = -3z=−3
Work out the value of yyy.
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.