Ответ:
х = 1 28/31
Пошаговое объяснение:
(x-29/31)+18/31 = 1 17/31
x-29/31+18/31 = 1 17/31
х - 11/31 = 1 17/31
х = 1 17/31 + 11/31
-------
(1 28/31-29/31)+18/31 = 1 17/31
(59/31-29/31)+18/31 = 1 17/31
30/31 + 18/31 = 1 17/31
48/31 = 1 17/31
1 17/31 = 1 17/31 - верно
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Ответ:
х = 1 28/31
Пошаговое объяснение:
(x-29/31)+18/31 = 1 17/31
x-29/31+18/31 = 1 17/31
х - 11/31 = 1 17/31
х = 1 17/31 + 11/31
х = 1 28/31
-------
(1 28/31-29/31)+18/31 = 1 17/31
(59/31-29/31)+18/31 = 1 17/31
30/31 + 18/31 = 1 17/31
48/31 = 1 17/31
1 17/31 = 1 17/31 - верно