1 (7x + 8) < 4x – 3
2 3
7x + 4 < 4x – 3
2 3
7 – 7x + 4 < 4x – 3 – 7x
2 2 3 2
3 + 4 < 13x – 3 + 3
6
7< 13x
6
1 (7x + 8 – x³) > 1 (5x – 7)
4 x²
7x + 2 – 1x > 5x – 7
4 4 2 2
7x + 2 – 1x > 5x – 7
4 4 2 2
-5x + 7x + 2 – 1x > 5x – 7 – 5x
2 4 4 2 2 2
-2 + 2 – x > -7 – 2
2
-x > -11
2
x < 11
2
-1 (2x + 7) <= 2x + 1
2
-x -7 <= 2x + 1
2
x – x -7 <=2x + 1 + x
2
-1 – 7 <= 3x + 1 – 1
2
-4 <= 3x
2
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