for number 3 you need to multiply -12 by each number in the parentheses which should leave you with -9x-24 on the left side. then you need to get x by it self on the left side so add like terms(if there are any) and then add 24 to -24 which would cancel out leaving just -9x greater than or equal to 24. after that you divide the x by 24 leaving you with x is less than or equal to -24/9 -8/3
4. repeat steps: -15x+35 less then or equal to 68 subtract 35 both sides leaving -15x and 33 then divide giving you x is GREATER than or equal to -33/15
