Question 1037742
Travel Rates Rule is RT=D to relate RATE, TIME, DISTANCE.


<pre>
                 RATE       TIME       DISTANCE
AS DONE          r           t           200
IF               r+10       t-1          200
</pre>


The exercise is similar to another one and the method would be the same.
See this as an instructive example:  <a href="https://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.1037668.html">https://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.1037668.html</a>