What equation bwould represent the vertical asymptote f(x)=a-log(x+c)

Step 1 ：The vertical asymptote of a logarithmic function is the value of x that makes the argument of the logarithm equal to zero.

Step 2 ：In this case, the argument of the logarithm is (x+c).

Step 3 ：Therefore, the vertical asymptote is the solution to the equation x+c=0.

Step 4 ：So, the equation representing the vertical asymptote of the function f(x)=a-log(x+c) is \(\boxed{x = -c}\).