diketahui fungsi f(x)=6x-2 dan g(x)=5x+4. Jika fungsi (f o g)(a)=82, berapakah nilai a?

fog(x) = f(5x + 4)
= 6 (5x+4) - 2
= 30x + 24 - 2 = 30x + 22
fog(a) = 30a + 22
82 = 30a + 22
30a = 82 - 22
30a = 60
a = 2