An equation with infinitely many solutions is a function which has after try to find the solution an result as (0 = 0)
Then, for the given equation:
1. Remove parenthesis by multiplying 2 by the two term in parenthesis:
[tex]8x+20=8x+k[/tex]2. The value that makes the equation have many solutions is 20 because:
[tex]\begin{gathered} 8x+20=8x+20 \\ 8x-8x=20-20 \\ 0=0 \end{gathered}[/tex]Answer B)20