Answer :
(35+15+10+12+x)/5=20
(72+x)/5=20
72+x=20 * 5
72 +x =100
x= 100 -72
x= 28$ do you need to save this week
(72+x)/5=20
72+x=20 * 5
72 +x =100
x= 100 -72
x= 28$ do you need to save this week