Question

8a-4*(3b-(b-(1-8b)))
Если a+3b=2

Answer 1

Ответ:

12

Объяснение:

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Answer 2

$8a - 4 \times (3b - (b - (1 - 8b) = \\ 8a - 4 \times (3b - (b - 1 + 8b) = \\ 8a - 4 \times (3b - (9b - 1) = \\ 8a - 4 \times (3b - 9b + 1) = \\ 4 \times (2a - 1 \times ( - 6b + 1)) = \\ 4 \times (2a + 6b - 1) = \\ 4 \times (2(a + 3b) - 1) = \\ 4 \times (2 \times 2 - 1) = \\ 4 \times3 = 12$