The solution of the simultaneous equations
3x=a+yx+5y=b \begin{aligned} 3x &= a + y \\ x + 5y &= b \end{aligned} 3xx+5y=a+y=bis x=74\displaystyle x = \frac{7}{4}x=47 and y=34\displaystyle y = \frac{3}{4}y=43.
Find the value of a a\,a and the value of bbb.
217 exam-style questions on OCR GCSE Maths Simultaneous Equations. Each one has a worked solution and a mark scheme showing where the marks go.