1)7x-21=3x+35
7х-3х=35+21
4х=56
х=56:4
х=14
2)39k - 134 = 1738
39К = 1738 + 134 = 1872К = 1872 : 39 = 48
7х-3х = 35+21
4х = 56
х = 14
ответ:14
39k-134 = 1738
39k = 1738+134
39k = 1872
k = 48
ответ:48
1)7x-21=3x+35
7х-3х=35+21
4х=56
х=56:4
х=14
2)39k - 134 = 1738
39К = 1738 + 134 = 1872
К = 1872 : 39 = 48