Question

calculati nr x,y si z stiind ca x/11=y/9=z/3 si x/11+y/9+z/3=18

Answer 1

x/11=y/9=z/3=k
x/11=k⇒x=11k
y/9=k⇒y=9k
z/3=k⇒z=3k
x/11+y/9+z/3=18
11k/11+9k/9+3k/3=18
k+k+k=18
3k=18
k=18/3
k=6
x=11k=11·6
x=66
y=9k=9·6
y=54
z=3k=3·6
z=18

Answer 2

  x/11=y/9=z/3=k x/11=k⇒x=11k y/9=k⇒y=9k z/3=k⇒z=3k x/11+y/9+z/3=18 11k/11+9k/9+3k/3=18 k+k+k=18 3k=18 k=18/3 k=6 x=11k=11·6 x=66 y=9k=9·6 y=54 z=3k=3·6 z=18