1) (3-4/7)х=5+2/3
17/7х=17/3
х=(17*7)/(3*17)
х=7/3
х=2+1/3 - 2целых одна/третья
в будущем между целой частью и дробью буду букву д писать
2) (1д5/6-3/8)х=2д1/12
(11/6-3/8)х=25/12
((4*11-3*3)/24)х=25/12
(35/24)х=25/12
х=(25*24)/(12*35)
х=(5*2)/(1*7)
х=10/7
х=1д3/7
3) ((5/8)-(1/4))*(1/х)=1/6
((5-2*1)/8)=х/6
((5-3)/8)=х/6
3/8=х/6
х=3*6/8
х=9/4
х=2д1/4
4) х((11/12)-(1/4))=3/8
х((11-3*1)/12)=3/8
8х/12=3/8
х=(3*12)/(8*8)
х=(3*3)/(2*8)
х=9/16
1) (3-4/7)*х = 5 2/3
3х-4/7х = 5 2/3
2 7/7х-4/7х = 5 2/3
2 3/7х = 5 2/3
17/7х = 17/3
х = 17/3:17/7
х = 17/3*7/17
х = 7/3
х = 2 1/3
Проверяем:
(3-4/7)*2 1/3 = 2 3/7*2 1/3 = 17/7*7/3 =17/3 = 5 2/3
ответ: 2 1/3.
2) (1 5/6-3/8)*х = 2 1/12
(11/6-3/8)*х = 25/12
(44/24-9/24)*х = 25/12
35/24х = 25/12
х = 25/12:35/24
х = 25/12*24/35
х = 10/7
х = 1 3/7
(1 5/6-3/8)*10/7 = 35/24*10/7 = 50/24 = 2 2/24 = 2 1/12
ответ: 1 3/7.
3) (5/8-1/4):х = 1/6
(5/8-2/8):х = 1/6
3/8:х = 1/6
х = 3/8:1/6
х = 3/8*6/1
х = 18/8
х = 9/4
х = 2 1/4
(5/8-1/4):9/4 = 3/8:9/4 = 3/8*4/9 = 1/6
ответ: 2 1/4.
4) х*(11/12-1/4) = 3/8
х*(11/12-3/12) = 3/8
х*8/12 = 3/8
х = 3/8:8/12
х = 3/8*12/8
х =36/64
х = 9/16
9/16*(11/12-1/4)= 9/16*8/12 = 3/8
ответ: 9/16.
1) (3-4/7)х=5+2/3
17/7х=17/3
х=(17*7)/(3*17)
х=7/3
х=2+1/3 - 2целых одна/третья
в будущем между целой частью и дробью буду букву д писать
2) (1д5/6-3/8)х=2д1/12
(11/6-3/8)х=25/12
((4*11-3*3)/24)х=25/12
(35/24)х=25/12
х=(25*24)/(12*35)
х=(5*2)/(1*7)
х=10/7
х=1д3/7
3) ((5/8)-(1/4))*(1/х)=1/6
((5-2*1)/8)=х/6
((5-3)/8)=х/6
3/8=х/6
х=3*6/8
х=9/4
х=2д1/4
4) х((11/12)-(1/4))=3/8
х((11-3*1)/12)=3/8
8х/12=3/8
х=(3*12)/(8*8)
х=(3*3)/(2*8)
х=9/16
1) (3-4/7)*х = 5 2/3
3х-4/7х = 5 2/3
2 7/7х-4/7х = 5 2/3
2 3/7х = 5 2/3
17/7х = 17/3
х = 17/3:17/7
х = 17/3*7/17
х = 7/3
х = 2 1/3
Проверяем:
(3-4/7)*2 1/3 = 2 3/7*2 1/3 = 17/7*7/3 =17/3 = 5 2/3
ответ: 2 1/3.
2) (1 5/6-3/8)*х = 2 1/12
(11/6-3/8)*х = 25/12
(44/24-9/24)*х = 25/12
35/24х = 25/12
х = 25/12:35/24
х = 25/12*24/35
х = 10/7
х = 1 3/7
Проверяем:
(1 5/6-3/8)*10/7 = 35/24*10/7 = 50/24 = 2 2/24 = 2 1/12
ответ: 1 3/7.
3) (5/8-1/4):х = 1/6
(5/8-2/8):х = 1/6
3/8:х = 1/6
х = 3/8:1/6
х = 3/8*6/1
х = 18/8
х = 9/4
х = 2 1/4
Проверяем:
(5/8-1/4):9/4 = 3/8:9/4 = 3/8*4/9 = 1/6
ответ: 2 1/4.
4) х*(11/12-1/4) = 3/8
х*(11/12-3/12) = 3/8
х*8/12 = 3/8
х = 3/8:8/12
х = 3/8*12/8
х =36/64
х = 9/16
Проверяем:
9/16*(11/12-1/4)= 9/16*8/12 = 3/8
ответ: 9/16.