Question 1163114
Going to:
{{{r*x=300}}}


Trip back:
{{{(r+10)(x-1)=300}}}



-------------A Different Way------------
<pre>
             SPEED        TIME        DISTANCE

GOING          r         300/r           300

BACK          r+10       300/(r+10)      300

DIFF                       1
</pre>
{{{300/r-300/(r+10)=1}}}------------simplify and solve this.