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Afla numarul necunoscut 100-(3xn+5xn)=44

Răspuns :

100-(3×n+5×n)=44
8
×x=100-44
8×x=56
x=7
100-(3xn+5xn)=44
100-8xn=44
-8xn=44-100
-8xn=-56
xn=-56:(-8)
xn=7