Question

Diketahui fungsi f dengan rumus f(x)=2x+5
jika f(a)=23 tentukan nilai a!

Answer 1

F(x) = 2x+5
f(a) = 23
f(a) = 2x+5 = 23
      = 2x = 23-5
      = 2x = 18
      = x = 18 / 2  = 9
maka, a = 9
   semoga membantu :)

Answer 2

F(x) = 2x+5
f(a) =23
= 2(a)+25
=2 (23)+25
=46+25
=71