If m fcg= 9x+3 and gcb= 13x-9

Find gcb

Didn't you just state that gcb = 13x - 9 ?

I have no clue what gcb is, or what m fcg is.

m is angle

To find the value of GCB, we need to substitute the given expression for GCB into the equation. We have the equation:

GCB = 13x - 9

Therefore, to find the value of GCB, we need to know the value of x. If x is not provided in the question, we cannot determine the exact value of GCB.