Răspuns:
X:4 = b + a
x: 10 = a + b
x= 4b + a
x = 10a + b
4b+a=10a+b
10a-a=4b-b
9a=3b
b/a = 9/3 = 3
dar in perechi : (a,b) = (1,3); (2,6);....
x = 4b + a = 4*3 +1= 13 =
x= 10a + b = 10*1+3= 13
x = 4b + a = 4*6 + 2 = 26
x = 10a +b=10*2+6 = 26
rezulta ca a = {1, 2, 3......}
b = {3, 6, 9, ......)