Diketahui rumus fungsi f adalah f(x)=4x-2. Jika f(a)=22, nilai a adalah..

f (x) = 4x - 2

f (a) = 22
4 (a) - 2 = 22
4a - 2 = 22
4a = 22 + 2
4a = 24
a = 24/4
a = 6

f(x)=4×-2 ditanyakan f(a) = 22 maka nilai a =...?
x = a, sehingga f(a) = 4a-2 = 22
f(a) = 4a = 22 + 2
f(a) = a = 24/4
a =6
jadi, nilai a = 6