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3x+7 ≤ 5x+3 5x+3 ≤ 2x+15
7-3 ≤ 5x-3x 5x-2x ≤ 15-3
4 ≤ 2x 3x ≤ 12
4/2 ≤ x x ≤ 12/3
2 ≤ x x ≤ 4
Hp = { 2 ≤ x ≤ 4 }
semoga bermanfaat
-4x 5