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x-x:10=45
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Răspuns :

X - X : 10 = 45 2X : 10=45 2X = 45 x 10 2X=450 X = 450 :2 X = 225
X - X : 10 = 45 => (10X - X):10 = 45 => 9X :10 = 45 => 9X = 450 => X=50