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ollk
@ollk
June 2022
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Пожалуйста, срочно решите уравнение:
7x-4(x-2(x-5(x-6)))=-21
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Verified answer
7x - 4(x - 2(x - 5(x - 6))) = -21
7x - 4(x - 2(x - 5x + 30)) = -21
7x - 4(x - 2(- 4x + 30)) = -21
7x - 4(x + 8x - 60) = -21
7x - 4(9x - 60) = -21
7x - 36x + 240 = -21
29x = 261
х = 9
ПРОВЕРКА: 9-6 = 3
9-15 = -6
9+12 = 21
63-84=-21
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Answers & Comments
Verified answer
7x - 4(x - 2(x - 5(x - 6))) = -217x - 4(x - 2(x - 5x + 30)) = -21
7x - 4(x - 2(- 4x + 30)) = -21
7x - 4(x + 8x - 60) = -21
7x - 4(9x - 60) = -21
7x - 36x + 240 = -21
29x = 261
х = 9
ПРОВЕРКА: 9-6 = 3
9-15 = -6
9+12 = 21
63-84=-21