suatu fungsi f(x-3)=16-3x, jika f(a)= 22, maka nilai a adalah pake cara ya makasih

f(x-3) = 16 - 3x

misal x-3 = p    maka x = p + 3
f(p) = 16 - 3(p+3)
f(p) = 16 - 3p - 9
f(p) = 7 - 3p
f(x) = 7 - 3x
f(a) = 7 - 3a

f(a) = 22

maka

7 - 3a = 22
-3a = 22-7
-3a = 15
a = -5

Diketahui :
f (x - 3) = 16 - 3x
f (a) = 22

Ditanya : nilai a ?

Dijawab :
f (x - 3) = f (a)
x - 3 = a
x = a + 3

f (a) = 16 - 3 (a + 3)
f (a) = 16 - 3a - 9
f (a) = -3a + 7

Nilai a :
f (a) = 22
-3a + 7 = 22
-3a + 7= 22
-3a + 7= 22
-3a = 22 - 7
-3a = 15
a = 15 / -3
a = -5

Jadi, nilai a adalah -5