di ketahui fungsi f(x)=5x-4 jika f(-2)=a dan f(b)=11,hitunglah nilai a+b?

f(x) = 5x - 4
f(-2) = 5(-2) - 4 = a
= -10 - 4 = a
a = -14

f(b) = 5b - 4 = 11
5b = 11 + 4
5b = 15
[tex] \frac{15}{5} = 3[/tex]

maka :
a+b = -14+3
= -11