12 19/17+х+8 16/17=23 2/17
х=23 2/17-8 16/17-12 19/17
х= 393/17-152/17-223/17
х= 18/17=1 1/17
12 19/17+х+8 16/17 = 23 2/17
х = 23 2/17-12 19/17-8 16/17
х = 393/17-223/17-152/17
х = 18/17
х = 1 1/17
Проверяем:
12 19/17+ 1 1/17+8 16/17 = 21 36/17 = 23 2/17
ответ: 1 1/17.
12 19/17+х+8 16/17=23 2/17
х=23 2/17-8 16/17-12 19/17
х= 393/17-152/17-223/17
х= 18/17=1 1/17
12 19/17+х+8 16/17 = 23 2/17
х = 23 2/17-12 19/17-8 16/17
х = 393/17-223/17-152/17
х = 18/17
х = 1 1/17
Проверяем:
12 19/17+ 1 1/17+8 16/17 = 21 36/17 = 23 2/17
ответ: 1 1/17.