To solve this equation, we need to simplify the left side of the equation first:

5a - (3a + 5) + 2a - 4

= 5a - 3a - 5 + 2a - 4
= 4a - 9

Now, the equation becomes:

4a - 9 = 8x - 4 = 3x + 11

Now, we can set the two expressions equal to each other and solve for a:

4a - 9 = 8x - 4
4a = 8x - 4 + 9
4a = 8x + 5
a = (8x + 5) / 4

Now, we set the other two expressions equal to each other and solve for x:

8x - 4 = 3x + 11
8x - 3x = 11 + 4
5x = 15
x = 15 / 5
x = 3

Therefore, the solution to the equation is:

a = (8(3) + 5) / 4
a = (24 + 5) / 4
a = 29 / 4

Therefore, a = 29/4 and x = 3.