Răspuns:
Explicație pas cu pas:
a=(a,b)·x=13x; b=(a,b)·y=13y
a+b=156, deci 13x+13y=156, 13(x+y)=156, x+y=156:13=12
Perechea (x,y)∈{(0,12),(1,11),(2,10),(3,9),(4,8),(5,7),(6,6),(7,5),(8,4),(9,3),(10,2),(11,1),(12,0)}
atunci Perechea de numere (a,b)∈(0,156),(13,143),(26,130),(39,117),(52,104), (65,91),(78,78),(91,65),(104,52),(117,39),(130.26),143,13),(156,0)}