Suatu fungsi g(x) = 4x - 1, jika g(a) = 27 maka nilai a adalah

4a-1=27
4a=28
a=7

Mudah kan

g(x) = 4x -1

g(a) = 4a - 1 = 27
g(a) = 4a = 27 +1
@ 4a = 28
@ a = 28/4
@ a = 7

Semoga membantu... ^_^