To solve this equation, we need to first distribute the 6(7/16) on the left side:

(x0 - a) - 6(7/16) = 3(17/16)

Now, convert the mixed fractions to improper fractions:

6(7/16) = 42/16
3(17/16) = 51/16

Now the equation becomes:

(x0 - a) - 42/16 = 51/16

Next, find a common denominator for the fractions on the left side:

(x0 - a) - 42/16 = 51/16
(x0 - a) - (42/16) = 51/16
(x0 - a) - (2(21/8)) = 3(17/16)

Combine the fractions on the left side:

(x0 - a - 21/8) = 3*(17/16)

Finally, add 21/8 to both sides to solve for x:

x0 - a = 3*(17/16) + 21/8
x0 - a = 51/16 + 42/16
x0 - a = 93/16

Therefore, the solution to the equation (x0 - a) - 6(7/16) = 3(17/16) is x0 - a = 93/16.