Posted by Brandon on Friday, November 30, 2007 at 3:22pm.
Use the equation distance = rate multiplied by time (d = r*t).
Let s be her rate on the side roads.
d = r*t
65 = s*t
Now, form a similar equation (using the numbers 30 & 7).
After you come up with your two equations, use either substitution or elimination to solve it.
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