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PepsyJr
a fost răspuns

Calculeaza numarul necounscut:
a+6*x*r=91
81:(18:x)=9
35:(x+1)=7

Răspuns :

Vyvy0471


81:x=81x9                x+1=7x35         

81:x=729                  x+1=245    

x=729:81                   x=245-1

x=9                             x=244                           

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