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daca xy+xz=126 si x=5 ,calculati y+z.

Răspuns :

xy+xz=126
x(y+z)=126
5(y+z)=126
y+z=126:5
y+z=25,2

xy+xz=126
x=5
y+z=?
xy+xz=x(y+z)
5(y+z)=126
y+z=126/5
y+z=25,2