Dik f(x) = 5x + 7 jika f(a) =2 maka nilai a adalah..

5a + 7 = 2
5a = 2 – 7
5a = -5
a = -5 ÷ 5
a = -1

Nilai a adalah -1.

F(x)=5x+7
u/
F(a) = 5(a)+7=2
=5a+7=2
=5a=-5
a=-5/5 = -1