Question

Gasiti cifra potrivita din:
_ __
9×aa = 4aa+40
URGENT VA ROOOG

Answer 1

_
9 × aa = 4aa +40
9 × aa = 400 + aa +40
9×aa-aa = 400+40
8×aa = 440
aa = 440:8
aa = 55 => a = 5

9 × 55 = 455+40
495 = 495

Answer 2

_ __
9*aa=4aa+40...=>...aa=(4aa+40):8
                                    =(400+40):8
                                    =440:8
                                    =55
aa=55

9*55=455+40
495=495