To set up equivalent ratios using the ratio \( \frac{3}{9} \), we can express it as:
\[ \frac{3}{9} = \frac{3x}{y} \]
To find a value for \( y \) that maintains the ratio, we can cross multiply:
Cross multiply:
\[ 3 \cdot y = 9 \cdot 3x \]
This simplifies to:
\[ 3y = 27x \]
Now, to solve for \( y \), we divide both sides by 3:
\[ y = 9x \]
Now, if we want to solve for \( x \) when \( y \) is a specific value of your choice, just replace \( y \) with that value and solve for \( x \).
If you have a specific value for \( y \) in mind, please provide it, and I can help you solve for \( x \) in miles!
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