Answer:
[tex]6\ miles[/tex]
Step-by-step explanation:
Let
x------> number of miles Vera ran
y-----> number of miles Ella ran
we know that
[tex]x+y=24[/tex] -----> equation A
[tex]y=3x[/tex] -----> equation B
substitute equation B in equation A and solve for x
[tex]x+(3x)=24[/tex]
[tex]4x=24[/tex]
[tex]x=6\ miles[/tex]