Si el número a37b = Multiplo de 72 calcular el valor de "a"?

<img src="https://tex.z-dn.net/?f=%5Coverline%7Ba37b%7D%3D72k_1%5C%5C%20%5C%5C%0A%281000a%2Bb%29%2B370%3D72k_1%5C%5C%20%5C%5C%0A1000a%2Bb%3D72k_1-370%5C%5C%20%5C%5C%0A1000a%2Bb%3D72k_1-%5B72%285%29%2B10%5D%5C%5C%20%5C%5C%0A1000a%2Bb%3D72%28k_1-5%29-10%5C%5C%20%5C%5C%0A1000a%2Bb%3D72k_2-10%5C%5C%20%5C%5C%0A1000a%2Bb%2B10%3D72k_2%5C%5C%20%5C%5C%0A%5Coverline%7Ba01b%7D%3D72k_2%0A" />

<img src="https://tex.z-dn.net/?f=%5Ctext%7BAl%20ser%2072%20m%5C%27ultiplo%20de%209%20entonces%20%7Da%2B0%2B1%2Bb%3D9%5C%C2%B0%5Cto%20a%2Bb%3D9%5C%C2%B0-1%5C%5C%20%5C%5C%0A%5Ctext%7BTambi%5C%27en%20%7D%5Coverline%7Ba01b%7D%3D8%5C%C2%B0%5Ctext%7B%20por%20ende%20%7Db%5Cin%5C%7B0%2C2%2C4%2C6%2C8%5C%7D%5C%5C%20%5C%5C%0A%28a%2Cb%29%5Cin%5C%7B%288%2C0%29%3B%286%2C2%29%3B%284%2C4%29%3B%282%2C6%29%3B%289%2C8%29%5C%7D%5C%5C%20%5C%5C%0A%5Ctext%7BLuego%20...%7D%5C%5C%20%5C%5C%0A%5Coverline%7Ba37b%7D%5Cin%5C%7B8370%2C6372%2C4374%2C2376%2C9378%5C%7D%5C%5C%20%5C%5C%0A%5Ctext%7BDe%20estos%20n%5C%27umeros%20toca%20elegir%20el%20que%20es%20m%5C%27ultiplo%20de%208%3A%7D%5C%5C%20%5C%5C%0A%5Cboxed%7B%5Coverline%7Ba37b%7D%3D2376%7D" />

Respuesta.

A = 2.