Nikita:
1) х = 14
2) х = 23
3) х = 36
4) х = 27
1) 94 - 4х = 38
4х = 94 - 38
4х = 56
х = 56 : 4 = 14
2) 13х + 2х = 345
15х = 345
х = 345 : 15 = 23
3) 7х - 26 = 226
7х = 226 + 26
7х = 252
х = 252 : 7 = 36
4) 9х + 5х = 378
14х = 378
х = 378 : 14 = 27
Gravel