Answer:
n=22
Step-by-step explanation:
20-9=11
0.5 x n =11
11/0.5=22
n = 22
Given
9 + [tex]\frac{1}{2}[/tex] n = 20 ( subtract 9 from both sides )
[tex]\frac{1}{2}[/tex] n = 11
Multiply both sides by 2 to clear the fraction
