Find f(g(2)) if
f(x) = 2x-1
g(x) = -3x

First you have to fine g(2)
g(2)= -3(2)
g(2)= -6
so f(g(2)) is equal to f(-6) so you have to find it too to get the whole solution
f(-6)= 2(-6)-1
f(-6)= -12-1
f(-6)= -13
so the final solution is f(g(2))=-13

hope this helps !