Question 56869
3x > 7x + 20 

This means  0 > 7x - 3x + 20

<-> 0 > 4x + 20

<-> -20 > 4x

<-> -5 > x

You have to look for every x that is smaller then -5.
Try to draw the graph yourself now, it's not that hard.
(hint: draw a vertical line at x=-5 and look to the area on the left of that line)