Diketahui rumus fungsi f (x) =-4x-5 jika f(a) = 19 maka nilai a adalah

f(x) = -4x - 5
f(a) = -4(a) - 5 = 19
-4a - 5 = 19
-4a = 19 + 5
-4a = 24
a = 24/-4
a = -6

Mapel : Matematika
Bab : Fungsi

f(x) = -4x - 5
f(a) = -4a - 5
 19 = -4a - 5
 4a = -5 - 19
 4a = -24
   a = -24/4
   a = -6