Question 1148884
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<pre>

Let the slower average speed be x miles per hour.


Then the faster average speed is  (x+9) miles per hour.


The time equation is


    {{{200/x}}} + {{{200/(x+9)}}} = 10  hours.


Solve it.

Your first step is to multiply both sides by x*(x+9) to rid of the denominators.

You will get a quadratic equation.

Reduce it to the standard form and solve by any way you can.
</pre>

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From this lesson, &nbsp;learn on how to write, &nbsp;how to use and how to solve a &nbsp;"time" &nbsp;equation.


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