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-7z - 7 ≤ -5z + 5
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-7z-7 <= -5z+ 5 Add 7 to both sides +7 +7 -7z <= -5z + 12 Add 5 to both sides +5z + 5z -2z <= 12 Divide each side by -2, so reverse inequality symbol z >= -6 z is greater than or equal to -6
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thaxn
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