Show on the number line x,x-4,2x+1,3x-2
<---|----|----|----|----|----|----|----|----|----|--->
-2 -1 0 1 2 3 4 5 6 7
↑ ↑ ↑
x−4 (−1) x (3) 2x+1 & 3x−2 (7)