1) сначала раскрываем скобки
(23/5)t+23/8-t=2и3/5-3t+3/4
(4и3/5)t-t+3t=3/4+2и3/5-2и7/8
(6и3/5)t=30/40+2и24/40-2и35/40
(33/5)t=19/40
t=19/40 : 33/5
t=19/40 x 5/33
t=19/264
2) (32/3) x 9-10и2/3k+81=107- 1/3k+20
96-10и2/3k+81=107-1/3k+20
1/3k-10и2/3k=107+20-96-81
-10и1/3k=-50
k=50 : (10и1/3)
k=50 x (3/31)
k=150/31
k=4и26/31
78|_2
6 36
18
-18
0
87|_3
6 29
27
27
0
630|_5
5 126
13
10
30
30
0
84|_4
8 21
4
4
0
674|_2
6 337
7
6
14
14
0
917|_7
7 131
21
21
7
7
0
762|_3
6 254
16
15
12
12
0
536|_2
4 268
13
12
16
16
0
805|_5
5 161
30
30
5
5
0
3/4:1/8=3/4*8/1= 6
3/4:1/12=3/4*12/1= 9
3/4:1/16=3/4*16/1= 12
3/4:1/20=3/4*20/1=15