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A. Write LE if the equation is linear, and NLE if it is not.
1. 3x + 4y = 12 ________________
2. y = 5 – 2x ____________________
3. y = x2 – 3 ______________________
4. 2xy = -5x + 6 __________________
5. 14x + 5y = 3 ___________________ ​