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Baronu2
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Gaseste valoarea fiecarei litere:
521=5×2×10:1:3:5+n

Răspuns :

Didi12342
521=5×2×10:1:3:5+n

10×10:1:3:5+n = 521

100:3:5+n =521

100/3×1/5+n = 521

100/15+n =521

n = 521-100/15

n = (521×15-100)/15

n = (7815-100)/15

n = 7715/15

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