Помогите решить : х : 2/7=7/12; 7/9 : х=7/18
Х : 2/7 = 7/12 7/9 : х = 7/18 х = 7/12 * 2/7 х = 7/9: 7/18 х = 1/6 х = 2 1/6 : 2/7 = 7/12 7/9 : 2 = 7/18