Sagot :
Cevap:
200
Adım adım açıklama:
bilinmeyen sayı: y olsun X=çarpı işlemi
(yx80)/100 = 160
100ü karşıya çarpı olarak atarız
yx80 = 160x100
yx80= 16000
80i karşıya bölü olarak atarız
y= 16000/80
Y=200
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