1. 2,5+1 2/3 -3 1 /6 2. а)х+1 3/4 = 5 1/3 б)х-4 5/8 =3 1/2

1. 25/10 + (1 * 3 + 2)/3 - (3 * 6 + 1)/6 = 5/2 + 5/3 - 19/6 = 15/6 + 10/6 - 19/6 = (15 + 10 - 19)/6 = 6/6 = 1;2. а) х + (1 * 4 + 3)/4 = (5 * 3 + 1)/3;х + 7/4 = 16/3;х = 16/3 - 7/4 = 64/12 - 21/12 = (64 - 21)/12 = 43/12;б) х - (4 * 8 + 5)/8 = (3 * 2 + 1)/2;х - 37/8 = 7/2;х = 7/2 + 37/8 = 28/8 + 37/8 = (28 + 37)/8 = 65/8.