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   cum calculam [900-(30×10+615÷3-45)]+a=1000

Răspuns :

Raluka2003
[900-(300+205-45)]+a=1000
(900-460)+a=1000
440+a=1000
a=1000-440
a=560
[900-(30×10+615÷3-45)]+a=1000=>[900-(300+205-45)]+a=1000>(900-460)+a=1000
440+a=1000
a=1000-440
a=660

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