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(a-1000)x 1000 egal 1000

Răspuns :

(a-1000)x1000=1000
a-1000=1000:1000
a-1000=1
a=1+1000
a=1001
(a-1000)x1000=1000
a-1000=1000:1000
a-1000=1
a=1+1000
a=1001
v: (1001-1000)x1000=1x1000=1000