Diketahui fungsi f(x+5)=2x-3 nilai f(-8) adalah

x + 5 = -8
x = -8 - 5
x = -13

f(-8) => 2(-13) - 3
f(-8) => -26 -3
f(-8) => -29

semoga membantu （＾ｖ＾）

Bab Fungsi
Matematika SMP Kelas VIII


f(x+5) = 2x-3
f(x) + 5 = 2x - 3
f(x) = 2x -3 - 5
f(x) = 2x - 8

f(-8) = ?
f(-8) = 2(-8) - 8
= -16 - 8
= -24

Semoga membantu;)