Пошаговое объяснение:
А)
x-1 3/14=-3 2/7;
x = -3 2/7 + 1 3/14
x = -3 4/14 + 1 3/14
x = -2 1/14
б)
5/7-х=3 1/7;
x = 5/7 - 3 1/7
x = -2 3/7
в)
-2 1/2+х=-2 1/14
x = -2 1/14 + 2 1/2
x = -2 1/14 + 2 7/14
x = 6/14
x = 3/7
