10000+2000+300+5=12305
1000000+300000+200+50+4=1300254
Lg(x+y)=Lg10, x+y=10, x = 10 - y
(10-y)^2 + y^2=16
100 - 20y +y^2 +y^2 = 16
2y^2 - 20y + 84 = 0
D = 8^2
y1 = 7
y2 = 3
x1 = 10 - 7 = 3
x2= 10 - 3 = 7
То есть x = 3, y = 7 или x = 7, y = 3
Не имеет значения.
24/25 и 15/25
11/36 и 21/36
30/40 и 19/40
35/42 и 31/42
18/40 и 13/40
68/100 и 1/100
69/96 и 1/96
138/140 и 139/140