Answer :
1/4(-5+n) < 20 the opposite of 5-n is -5+n
multiply by 4
-5 + n < 80
plus 5
n< 85
multiply by 4
-5 + n < 80
plus 5
n< 85
1/4 * 1/5 - 5 < 20
1/20 - 5 <20
1/20 - 100/20 <20
99/20 < 20
4.95 < 20
1/20 - 5 <20
1/20 - 100/20 <20
99/20 < 20
4.95 < 20