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a=2400105
x=5151625115
a+x+b=21619190019611
b=?-h=20000
h=19999


Răspuns :

a+x = 2400105+5151625115 = 5154025220

5154025220+b = 21619190019611

b = 21614035994391

b = ?-h = 20000

? = y

b = y - 19999 = 20000

y = 39999