suatu fungsi didefinisikan sebagai g:x ➡ 5x-1 tentukan: a) nilai g (4) b) nilai x jika g(x)=9

g(x) = 5x - 1
g(4) = 5.4 - 1
g(4) = 19

g(x) = 9
5x - 1 = 9
5x = 10
x = 2

A) nilai g :
g(4)=5×4-1
= 20-1
=19
B)nilai x
g(x) :5x - 1=9
:5x =10
: x = 2