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aciiil yarın sınav varr​

Aciiil Yarın Sınav Varr class=

Sagot :

Benaykrans

Cevap:

Adım adım açıklama:

Kural:  x . (x+1 ) /2

x . (x+1)/2 = 210

x . (x+1) = 420

20 . 21 = 420

x = 20

Seherdoagnrans

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