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x/5=y/3=z/7 si x+y+z=80. Determinati x,y si z

Răspuns :

×/5+y/3+z/7=80/15simplificam prin 5 =16/3
×=(16•5)/3
×=80/3
×=26,(6)
y=(16•3)/3
y=16
z=(16•7):3
z=112/3
z=37,(3)
poti lasa sub forma fe fractie daca vrei