Ответ:
-1 1/6
Пошаговое объяснение:
3 1/7a-1 =
= (3*7+1)/7 * а - 1 =
= (21+1)/7 * а - 1 =
= 22/7 * а - 1 =
= 22/7 * (-3/11) - 1
= -(11*2*3)/(7*11) - 1 =
= -6/7 - 1 = -1 1/6
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Ответ:
-1 1/6
Пошаговое объяснение:
3 1/7a-1 =
= (3*7+1)/7 * а - 1 =
= (21+1)/7 * а - 1 =
= 22/7 * а - 1 =
= 22/7 * (-3/11) - 1
= -(11*2*3)/(7*11) - 1 =
= -6/7 - 1 = -1 1/6