Question 1066312
If y is length and x is width, then {{{y-x=50}}}.


Assuming the missing part of the description is "fence material" and is intended for the perimeter of 3000 meters, then {{{2x+2y=3000}}}.



Simplify that perimeter equation:
{{{x+y=1500}}}.



You now have a simpler system of two equations in x and y.
{{{system(-x+y=50,x+y=1500)}}}
which is easily solvable using the Elimination Method.