Respuesta :

Twenty ducklings were swimming at the pond
calculista

Answer:

[tex]20\ ducklings[/tex]

Step-by-step explanation:

Let

x------> the number of ducklings

y------> the number of adult ducks

we know that

[tex]x+y=24[/tex] ------> equation A

[tex]\frac{x}{y}=\frac{5}{1}[/tex]

so

[tex]x=5y[/tex]

[tex]y=0.20x[/tex] ------> equation B

Substitute equation B in equation A

[tex]x+0.20x=24[/tex]

[tex]1.20x=24[/tex]

[tex]x=20\ ducklings[/tex]