Question

Dada a função f(x)= 3x-27 calcule X,para f(x)=9

Answer 1

f(x)= 3x-27
f(9)= 3.9-27
f(9)= 27-27
f(9)= 0

Answer 2

f (x)=3.9-27
f (x)=27-27
f(x)=0