-2|3d - 5| ≤ 10
divide both-side of the equation by -2
|3d - 5| ≥ -5
3d -5 ≥ -5 and 3d -5 ≤ -5
3d ≥ -5 +5 and 3d ≤ -5 +5
3d≥0 and 3d
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