Suatu fungsi mempunyai rumus f(x)=ax+9. jika f(-9) = 12, maka nilai a adalah….

F(x) = ax + 9
f(-9) = -9a + 9 = 12
-9a = 3
a = -1/3

#semoga membantu

12= -9a+9
12-9 = -9a
3 = -9a
-1/3 = a