5.520 Решите уравнение:

a) 2/3 * x = 1 => x = 3/2.
б) 51/62 * y = 1 => y = 62/51.
в) 3/10 * a = 1 => a = 10/3.
г) 104/183 * b = 1 => b = 183/104.
д) 7/25 * x = 7/25 => x = 1.
е) 13/6 * y = 13/6 => y = 1.