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daca xy-xz=625 si x=5 y-z

Răspuns :

xy-xz=x(y-z)
625=5(y-z)
y-z=625;5=125
xy-xz=625  x=5
xy-xz=x(y-z)=625
5(y-z)=625
y-z=625:5
Y-z=125