1) 17-4(zx-1) = 917 - 4zx + 4 = 9-4zx + 21 = 9-4zx = -12zx = 3Ответ: x = 3/4
2) 17 - 4(-zx-1) = 917 + 4zx + 4 = 94zx + 21 = 94zx = -12zx = -3Ответ: x = -3/4
1) 17-4(zx-1) = 9
17 - 4zx + 4 = 9
-4zx + 21 = 9
-4zx = -12
zx = 3
Ответ: x = 3/4
2) 17 - 4(-zx-1) = 9
17 + 4zx + 4 = 9
4zx + 21 = 9
4zx = -12
zx = -3
Ответ: x = -3/4