Question 129382
8z + 7 < 1/2z + 2

= (-7) + 8z + 7 < 1/2z + 2 + (-7)

= 8z < 1/2z + (-5)

= (-1/2z) + 8z < 1/2z + (-5) + (-1/2z)

= -1/2z + 16/2z < -5

= 15/2z < -5

= (2) 15/2z < -5 (2)

= 15z < -10

= (1/15) 15z < -10 (1/15)

= z < -10/15

= z < -2/3