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Rezolva prin metoda mersului invers:

x+6 543+ 3 456= 20 001
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Si
x-250- 16 000= 13 750
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Dau coroana


Răspuns :

prima:
x=20001-3456-6543
a doua:
x=13750+16000+250
x= 20001- ( 6543+3456)
x= 20001- 9999
x=10002

x= 16000-13750-250
x=2000