32x + 8 < 9x2
16x + 8 – 8 – 9x < 9x – 9x – 8
7x < - 8
(1) 7x < - 8 (1)
7 7
x < - 8
7
32x – 7x < 4x + 23
11x < 4x + 2
3
11x – 11x - 2 < 4x + 2 – 2 - 11x
3 3 3
(3) -2 < 1x (3)
3
-6 < x
5x³ + 32 < 32x + 2x²
5x + 32 < 32x + 2
5x + 32 – 5x – 2 < 32x +2 – 2
(1 ) 30 < 32x (1 )
32 32
15 < x
16
1x + x² ≤ 7x + 8 < 22x²
3 < 7x + 8 < 2
2
3 – 8 < 7x + 8 – 8 < 2 – 8
2
(1) – 13 < 7x (1) < -6 (1)
7 7 7 7
-13 < x < -6
14 7
5 < 32x + 2 < 7
5 – 2 < 32x + 2 – 2 < 7 – 2
(1 ) 3 < 32x (1 ) < 5 (1 )
32 32 32
3 < x < 5
32 32
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