Question 65042
1. Is 3x-2y+z>(or equal to)19?
       3(4)-2(-3)+2>(or equal to)19
        12+6+2>(or equal to)19
            20>(or equal to)19
                YES
Correct!!!!
2. Is 3(x+4y)<(or equal to)z
       3(4+4(-3)<(or equal to)2
        -3(4-12)<2
        -3(-8)<2
            24<2
             NO
Correct!!!!    

3. Is -3(x+4y)>z
       -3(4+4*-3)>2
        -3(4-12)>2
           -3(-8)>2
             24>2
              YES
Correct!!!
You got all the right answers, but got there wrong.  I made some adjustments to the work you did.
Happy Calculating!!!