afla numere necunoscute :

x : 15 = 17 rest 7
169 : a = 24 rest 1
a : 7 = 143 rest 6
286 : b = 15 rest 1

a x 16 = 224
12 x a = 300
a x 7 = 756
24 x a = 744


HELP Me !!