Matematika

Pertanyaan

I 7-4X I ≤9
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1 Jawaban

  • |7-4x|≤9
    <=> -9 ≤ 7-4x≤9
    <=> -9-7≤-4x≤9-7
    <=> -16≤-4x≤2
    <=>-16/-4≤x≤2/-4
    <=> 4≤x≤-½
    <=> -½≤x≤4

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