If f(3a-1) = 12a-7, what is f(x)?

4 times 3a-1 is 12a - 4

12a - 7 is three less than that.
Therefore f(x) = 4x -3

To find the expression for f(x), we can substitute the given value (3a-1) into the equation f(3a-1) = 12a-7.

So, let's replace x with (3a-1):

f(x) = 12x - 7

Substituting (3a-1) for x:

f(3a-1) = 12(3a-1) - 7
= 36a - 12 - 7
= 36a - 19

Therefore, the expression for f(x) is f(x) = 36x - 19.