Tolong dijawab please kak arau teman teman!!!!!!!!!!!!!!!!!​

b. 1

Penjelasan dengan langkah-langkah:

f(x) = 2x + 5

f(a) = 2(a) + 5

7 = 2a + 5

-2a = 5 – 7

-2a = -2

a = -2/-2

a = 1