Suatu fungsi f(x)=4x-3.jika f(a)=13maka nilai a adalah

f(a) = f(x)
f(a) = 4x-3
f(a) = 13
f(a) = 4a-3=13
4a=16
a=4

semoga benar

4a-3 = 13
4a = 16
a = 16/4
a = 4