Răspuns :
y/5=z/7=k
⇒ y=5k , z=7k
x=20/100*y=y/5=k
stiu ca x+z=24 inlocuiesc si am
k+7k=24⇒ 8k=24⇒ k=3
x=3 , y=5*3=15, z=7*3=21
⇒ y=5k , z=7k
x=20/100*y=y/5=k
stiu ca x+z=24 inlocuiesc si am
k+7k=24⇒ 8k=24⇒ k=3
x=3 , y=5*3=15, z=7*3=21
x= 20% din y
x= 20/100 * y= 2/10 * y= 1/5 * y= y/5
x=y/5
y,z dp cu 5,7
y/5= z/7= k
y=5k
z=7k
x+z=24
x=5k/5= k
k+7k=24
8k=24
k=24:8
k=3
y=5*3=15
x=3
z=7*3=21
x= 20/100 * y= 2/10 * y= 1/5 * y= y/5
x=y/5
y,z dp cu 5,7
y/5= z/7= k
y=5k
z=7k
x+z=24
x=5k/5= k
k+7k=24
8k=24
k=24:8
k=3
y=5*3=15
x=3
z=7*3=21