y=px+12qx2\displaystyle y = px + \frac{1}{2}qx^2y=px+21qx2
p=7p = 7p=7 q=2q = 2q=2 x=4x = 4x=4
Work out the value of yyy.
296 exam-style questions on Eduqas GCSE Maths Substitution. Each one has a worked solution and a mark scheme showing where the marks go.