Tolongggg jawab dong pliss,nomor 13!!!!!!!!

H:x ⇒ 5x – m
h(1) = 8
    5(1) – m = 8
    5 – m = 8
    -m = 8 – 5
    m = 3/-1 = -3
h(2) = 5x – m
        = 5(2) – (-3)
        = 10 + 3
        = 13