Răspunsuri

2014-10-29T12:31:04+02:00
10a + b - 10b -a = 45
9a - 9b = 45
a-b = 5
daca a ∈{9,8,7,6,} ⇒b∈{4,3,2,1}
ab ∈{94,83.72,61}
38 4 38