Question: How to solve non-linear equations(more variable than equations) plot

I have two equations as below,

2*D*(2*(a^2)*(y^4)-(a^4)*(y^2)-1)/((a^2)*(y^3))=10;

x=2*D*((a^4)*(y^2)-1)/((a^4)*(y^3));

and I need to plot the graph(x,y), how can I do?

Many thx..

 

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