To solve for "a" in the equation 3⁄4 = 6⁄ (3a - 1), we first need to simplify the equation:

3⁄4 = 6⁄ (3a - 1)

To simplify the right side of the equation, we can multiply both the numerator and denominator of 6⁄ by 4:

3⁄4 = 24⁄ (3a - 1)

Now, we can cross multiply:

3(3a - 1) = 24(4)
9a - 3 = 96

Add 3 to both sides:

9a = 99

Divide by 9:

a = 11

Therefore, the value of "a" in the equation 3⁄4 = 6⁄ (3a - 1) is 11.