Diketahui f(x)=5x -7 jika f(a)=8 maka nilai a adalah

Langsung aja ya

5a – 7 = 8
5a = 8+7
5a = 15
a = 15/5
a = 3

F(x) = 5x -7
f(a) = 5a – 7
5a = 8 + 7
5a = 15
a = 15 : 5 = 3