Question 1104387
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Harry drove for 5 hours on the​ freeway, then decreased his speed by 20 miles per hour and drove for 2 more hours on a country road. If his total trip was 4422 ​miles, then what was his speed on the​ freeway
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<pre>
FREEWAY         r          5
COUNTRY         r-20       2
TOTAL                      7             4422
</pre>

Variable assigned and information tabulated according to problem description.
Fill in the missing pieces.

<pre>
              SPEED      TIME        DISTANCE
FREEWAY         r          5         5r
COUNTRY         r-20       2         2(r-20)
TOTAL                      7          4422
</pre>

Solve the equation  {{{highlight_green(5r+2(r-20)=4422)}}}.


You might get a strange value for r.  The problem is not the best made-up exercise example.


(637 mph, for r;  recheck your original problem description.)