Find the area of the region in the xy-plane given by $0\le y \le 2x,\; 4\le 15x^2-y^2 \le 7$

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Find the area of the region in the xy-plane given by $0\le y \le 2x,\; 4\le 15x^2-y^2 \le 7$

how to solve using by substitution $u=16x^2-y^2,v=x^{-1}y$

any one can hemp please