Respuesta :

Kaikerscupcake
Plug in the variables. 

3(9)-2(3)/2-1

27-6/1

21/1

21 <==== the answer

I hope this helps!
~kaikers
3a-2b/c-1
a=9 b=3 c=2

The answer is:
3x9 - 2x3 / 2-1
27 -6 /1
21/1
21 is the answer