and to end it: you know that

h= 100-47.37+1.579k

you know that h can only be 10, 20, 30, 40, 50, 60, 70, 80 or 90...

h=10, k=-26.99
h=20, k=-20.66
h=30, k=-14.33
h=40, k=-7.99
h=50, k=-1.66
h=60, k=4.66
h=70, k=11
h=80, k=17.33
h=90, k=23.66

h=70, k=11

j=47.37 - 2.579k = 19 :)