2x <_ 5 - 7x < 7 + x
Matematika
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Pertanyaan
2x <_ 5 - 7x < 7 + x
1 Jawaban
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1. Jawaban ahreumlim
2x ≤ 5 - 7x < 7 + x
(i)
2x ≤ 5 - 7x
9x ≤ 5
x ≤ 5/9
(ii)
5 - 7x < 7 + x
-8x < 2
8x > -2
x > -2/8
x > -1/4
Jadi HP : {x| -1/4 < x ≤ 9/5}