2) five times the number one less than nine (x instead of one number ) can be written as the sum ของจำนวน 5x < 9
3) number one with five more than twelve (x instead of one) and write. X+5 > 12
4) twice the difference of the number of one of four not less than three (. X instead of one) can be written as 2 (x 4) - > = 3 or 2 (4 x) - > = 3.
5) two-thirds of the three number no more than six (x instead of one) can be written as 32x < = 6
6) five times of seven more than thirty. Write a 5 (7) > 30.
7) number number one greater than three (instead of one) x number can be written as x > 3.
8) number one is equal to or greater than six (x instead of one) can be written as x > = 6.
9) and three times the one plus seven more than nine (x instead of one) can be written as 3x + 7 > 9.
10) five times of the sum of the number one and two less than eight (x instead of one) can be written as 5 (x + 2) < 8.
6. The summary, the meaning of the inequalities. From the sentences used mathematical symbols above.