Question 1037342
<pre>
                RATE           TIME         DISTANCE
WITH            r+w             3            312               
AGAINST         r-w             4            312
</pre>

{{{system((r+w)3=312,(r-w)4=312)}}}
Solve the LINEAR system for r and w.


Algebra steps:
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{{{system(r+w=312/3,r-w=312/4)}}}
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{{{system(r+w=104,r-w=78)}}}
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{{{r+w+r-w=104+78}}}
{{{2r=182}}}
{{{highlight(r=91)}}}
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