exam Maths Puzzle Numerical Ability

Solve by elimination..
3x+2y=9
-x=3y=8

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exam Other Question

Let X and Y be nonempty sets and let h:X x Y -> R have a bounded range in R. Let f:X -> R and g:X->R be defined by f(x):=sup{h(x,y) : y in Y}, g(y) := inf{h(x,y) : x in X}. Prov A rectangular corral has a perimeter of 64 yards. Its length is 8 yards more than its width. What are the dimensions of the corral?