The document discusses solving various inequalities and number sentences: 1) It provides 4 examples of inequalities with solutions ranges indicated by T1 through T4 2) The first inequality is about the sum of 3 and a number being less than or equal to -9. The second is about a number less than 5 being greater than 7. 3) The third gives conditions for x being greater than or equal to 5 and less than 7. The fourth involves a number plus 3 being greater than or equal to 12.