4(x + 1) ≤ 9 - 2x

2(x + 5) ≤ 1 - x

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4x + 4 ≤ 9 - 2x

2x + 10 ≤ 1 - x

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4x + 2x ≤ 9 - 4

2x + x ≤ 1 - 10

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6x ≤ 5

3x ≤ -9

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x ≤ 5/6

x ≤ -3

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x ∈ (-∞, -3]

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Объяснение:

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