5x +5y+25z ,stiind ca x+y+5Z=10!!!! REPEDE VA ROG FRUMOS!

Răspuns :

x+y+5z=10/×5
5(x+y+5z)=50
5x+5y+25z=50
x+y+5z=10/×5
5(x+y+5z)=50
5x+5y+25z=50