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29 January, 21:54

5 (9-X) ≤ 4 (X+18) blalalalala

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Answers (2)
  1. 29 January, 23:20
    0
    x ≥ - 3

    Step-by-step explanation:

    5 (9-x) ≤4 (x+18)

    45-5x≤4x+72

    subtract 4 from both sides

    45-9x≤72

    subtract 45 from both sides

    -9x≤27

    divide by - 9, but when you divide by a negative in an inequality you have to flip the sign

    x≥-3
  2. 30 January, 00:21
    0
    -3 ≤ x

    Step-by-step explanation:

    5 (9-X) ≤ 4 (X+18)

    Distribute on both sides

    45 - 5x ≤ 4x + 72

    Add 5x to each side

    45 - 5x+5x ≤ 4x+5x + 72

    45 ≤ 9x + 72

    Subtract 72 from each side

    45-72 ≤ 9x + 72 - 72

    -27 ≤ 9x

    Divide by 9

    -27/9 ≤ 9x/9

    -3 ≤ x
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