Diketahui f(x - 3) = 3x -7. jika f(a) = -7, maka nilai a adalah.... beserta cara ya.. saya tungu jawabannya

Langsung aja y

f(x - 3) = 3x - 7
misal :
x - 3 = a
x = a+3

soal menjadi →
f(a) = 3(a+3) - 7
f(a) = 3a + 9 - 7
f(a) = 3a + 2

f(a) = 3a + 2
-7 = 3a + 2
3a = -7 - 2
3a = -9
a = -3

Semoga berguna +_+

f(x - 3) = 3x - 7

a = x - 3 → x = a + 3
f(a) = 3(a + 3) - 7
-7 = 3(a + 3) - 7
-7 = 3a + 9 - 7 → a = -3