А) 14, 42, 63
б) 51, 68
в)14, 22, 31, 42, 51, 63, 68, 75
г) 31, 51, 62, 75
<span>a)13/15 -2/15=11/15
11/12 - 5/12=6/12
б)</span><span>3/4 - 1/8=6/8-1/8=5/8
8/21 - 3/7=</span> 8/21 - 9/21= -1/21
а)<span>1/3 - 1/18 + 1/6=8/18
б)</span><span>7/12 + x = 5/6
х=5/6-7/12
х=3/12</span>
1030.
ху=7,4469
(х+2,54)у=ху+2,6162
(х+2,54)у=7,4469+2,6162
(х+2,54)у=10,0631
у=10,0631/х+2,54
у=7,4469/х
7,4469/х=10,0631/х+2,54
7,4469/х-10,0631/х=2,54
-2,6162/х=2,54
х=-2,6162/2,54
х=-1,03
у=7,4469/(-1,03)
у=-7,23
Ответ: -1,03; -7,23
1031.
ху=25,41
(х-6,7)у=3,3
ху=25,41
у=25,41/х
(х-6,7)*25,41/х=3,3
25,41х-170,247=3,3х
25,41х-3,3х=170,247
22,11х=170,247
х=7,7
у=25,41/7,7=3,3
Ответ: 7,7 и 3,3