Răspunsuri

2014-10-15T19:25:39+03:00
Fie x nr necunoscut.
[(x+139)-425]+99=571
(x+139)-425=571-99
(x+139)-425=472
x+139=472+425
x+139=897
x=897-139
x=758
Rs:M-am gindit la numarul 758.
2014-10-15T22:41:11+03:00
571-99+425-139=
472+425-139=
898-139=
759

iti multumesc mult Andreea!!!! Sa-ti dea dumnezeu sanatate ca istetime dovedesti ca ai!!!
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