Б и Г Заблаговременно спасибо!!!!!!

Б) 3/8у+у-1/4у =3
(при у=2 2/3 и 4/9)
3/82 2/3+2 2/3- 1/42 2/3=3
1. 3/82 2/3=3/88/3=38:83=1
2. 1/48/3=18:43=2/3
3. 1+2 2/3 -2/3=3

3/84/9+4/9-1/44/9=1/2
1. 3/84/9=34:89=1/6
2. 1/44/9=14:49=1/9
3. 1/6+4/9-1/9=6/36+16/36-4/36=18/36=1/2


г) 1/3х+3/4х-4/9х=
( при х= 1 13/23 и х=4/46)

1/31 13/23+3/41 13/23-4/91 13/23=1
1. 1/31 13/23=1/336/23=136:323=12/23
2. 3/436/23=336:423=27/23
3. 4/936/23=436:923=16/23
4. 12/23+27/23-16/23=23/23=1

1/34/46+3/44/46-4/94/46=1/18
1. 1/34/46=14:346=4/138
2. 3/44/46=34:446=3/46
3. 4/94/46=44:946=16/414
4. 4/138+3/46-16/414=4/138+9/138-16/414=
=13/138-16/414=39/414-16/414=23/414=1/18