( x + sqrt {y} ) ^2 = 50 + (14 sqrt {y})
help...
x^2 + 2xsqrty + y = 50 + 14 sqrt y You have one equation and two variables. DO you have another eqaution relating x and y?
One possible solution would be
x^2 +y = 50
and 2x sqrty = 14 sqrty so x = 7 then y = 1 (from first equation)
Here is a graph of all of the possible solutions: