Răspuns :
a + b = 1,(6)
a - b = 0,(3)
1,(6) = 16-1 / 9 = 15/9 = 5/3
0,(3) = 3/9 = 1/3
a + b = 5/3
a - b = 1/3 ⇒ a = 1/3 + b
1/3 + b + b = 5/3
2b = 5/3 - 1/3
2b = 4/3
b = 4/3 : 2
b = 4/3 x 1/2
b = 2/3 = 0,(6)
a = 1/3 + 2/3
a = 3/3
a = 1
a - b = 0,(3)
1,(6) = 16-1 / 9 = 15/9 = 5/3
0,(3) = 3/9 = 1/3
a + b = 5/3
a - b = 1/3 ⇒ a = 1/3 + b
1/3 + b + b = 5/3
2b = 5/3 - 1/3
2b = 4/3
b = 4/3 : 2
b = 4/3 x 1/2
b = 2/3 = 0,(6)
a = 1/3 + 2/3
a = 3/3
a = 1