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×+3300-4260=2040 metoda mersului invers

Răspuns :

Răspuns:

x + 3300 - 4260=2040 | + 4260

x + 3390 = 6300 | - 3390

x = 2910

Răspuns:

x+3300-4260=2040

x+3300=2040+4260

X+3300=6300

x=6300-3300

x=3000