The Walker family and the Goodman family are going to the cinema. The Walkers pay £22 for 2 adult tickets and 1 child ticket. The Goodmans pay £26 for 1 adult ticket and 3 child tickets.
The children's ticket is $6 and an adults ticket is $8.
Set up two equations, 2A+C=22 and A+3C=26. Rearrange the second equation to A=26-3C. Now plug this in to the first equation so you get 2(26-3C)+C=22 and solve
