fungsi f(x)=4x+3.jika f(a)=-5.nilai a adalah

f(x)=4x+3; f(a) = -5
f(a) = 4a + 3 = -5
4a = -5 - 3
4a = -8
a = -2

f(x) = 4x + 3
f(a) = -5
x = a
4x + 3 = -5
4x = -5 - 3
4x = -8
x = -8/4
x = -2