jawablah pertanyaan berikut! 1. 2X-4 > 3X+9 [tex]2. - \frac{1}{4} ( \times + 1) < 2[/tex]

1.) 2x - 4 > 3x + 9
→ 2x - 3x > 9 + 4
→ -x > 13
→ x < -13

2.) -¼ (x + 1) < 2
✐ Kalikan kedua ruas dgn ⁴/₁

→ - ¹/₁ (x + 1) < ⁸/₁
→ -1 × ¹/₁ (x + 1) < 8
→ -1 (x + 1) < 8
→ -x - 1 < 8
→ -x < 8 + 1
→ -x < 9
→ x > -9