Пошаговое объяснение:
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Пошаговое объяснение:
Б)
= -8/21 * 7/16 - 8/21у - 1/6 - у =
-1/3 * 1/2 - 8/21у - 1/6 - у =
-1/6 - 8/21у - 1/6 - у =
-2/6 - 1. 8/21у =
-1/3 - 1. 8/21у
В)
= 7/18 * 27/28 + 7/18х + 1/4 - х =
1/2 * 3/4 + 7/18х + 1/4 - х =
3/8 + 7/18х + 1/4 - х =
3/8 + 7/18х + 2/8 - х =
5/8 - 11/18х
Г)
= -9/28 * 35/36 + 9/28х - х - 5/8 =
-1/4 * 5/4 + 9/28х - х - 5/8 = -5/16 + 9/28х - х - 10/16 = -15/16 - 19/28х