The expression that could best describe the statement would be " 40 n + 20

260.
19) 5c+c=-6+2
6c=-4
c=-4/6
c=-2/3
20) -20-8=-2e
-28=-2e
28/2=e
14=e
21)p-2w=2l
(p-2w)/2=l
Okay so John needs to buy 7.6 quarts of paint so he would spend 26.55 on paint.
Hope this helps:)