1. 7x – 2y – 1
2. 2x² – 8
3. 2x + 3 + 5x – 7 = 5x² – 6
4. 3x² – 1 + 2x² – 5 = 5x² – 6
5. x² + x + 3 + 2x² – 5x² – 3 = -2x² + x
6. 4x² – 3x – 1 + x + 3x + 8 = 4x² + 7
2. 2x² – 8
3. 2x + 3 + 5x – 7 = 5x² – 6
4. 3x² – 1 + 2x² – 5 = 5x² – 6
5. x² + x + 3 + 2x² – 5x² – 3 = -2x² + x
6. 4x² – 3x – 1 + x + 3x + 8 = 4x² + 7