SAT Right triangles Question

At a constant temperature, a scuba diver combines two different concentrations of nitrox mix (oxygen-nitrogen gas mixture) to fill a tank to a total pressure of 90 atmospheres (atm), of which $37\%$ is contributed by oxygen. Nitrox mix A contributes $x$ atm of pressure to the tank, of which $22\%$ is contributed by oxygen. Nitrox mix B contributes $y$ atm of pressure to the tank, of which $49\%$ is contributed by oxygen. Which system of equations represents this situation?