Di ketahui f(x)=8-2x,jikaf(a)=-2 maka nilai a adalah​

8-2(a) = -2

8-2a = -2

2a = 10

a = 5

• Fungsi

f(x) = 8 – 2x
f(a) = 8 – 2a
-2 = 8 – 2a
2a =10
a = 5