Пошаговое объяснение:
12 - 4 • ( х - 3 ) = 39 - 9х
12 - 4х + 12 = 39 - 9х
24 - 4х = 39 - 9х
9х - 4х = 39 - 24
5х = 15
Х = 3
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Пошаговое объяснение:
12 - 4 • ( х - 3 ) = 39 - 9х
12 - 4х + 12 = 39 - 9х
24 - 4х = 39 - 9х
9х - 4х = 39 - 24
5х = 15
Х = 3