fungsi f ditentukan dgn rumus f(x) = 10-4x, jika f(a) = 26,,tentukan nilai a!,,tolong yahh

F(x) = 10-4x [tex] \\ [/tex]∛f(a) = 10-4a= 26 [tex] \\ [/tex] 4a=-16 [tex] \\ \\ [/tex] a=-4

f(a)=26
10-4a=26
-4a=26-10
-4a=16
a=16/-4
a=-4