Inequality or Equation  Check Method 
2x  3 = 1  Check #1? 
4x < 12  Check #2? 
19  3x < 7  Check #3? 
2x + 5 < 9 and x + 1 > 0  Check #4? 
2x + 5 > 9 or x + 1 < 0  Check #5? 
2x  5 < 1  Check #6? 
2 + x  3 > 4  Check #7? 
x  1 < 3 and x  3 > 2  Check #8? 

