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am nevoie urgenta ...........

Am Nevoie Urgenta class=

Răspuns :

xy = yx +54
xy - yx = 54
10x+y - 10y - x = 54
9x - 9y = 54
9×(x-y) = 54
x-y = 54 : 9
x - y = 6
9 - 3 = 6
8 - 2 = 6
7 - 1 = 6
xy = 93; 82; 71

93 = 39 + 54
82 = 28 + 54
71 = 17 + 54