document.write( "Question 702530: A plane can fly 320 miles in the same time as it takes a car to go 120 miles. If the car travels 100 mph slower than the plane, find the speed of the plane. \n" ); document.write( "
Algebra.Com's Answer #433597 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
Which Vehicle----Speed-------------Time-------------Distance
\n" ); document.write( "Car:___________r-100___________t____________120
\n" ); document.write( "Plane:__________r_______________t____________320\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Time is the same for both.
\n" ); document.write( "Car: \"t=120%2F%28r-100%29\"
\n" ); document.write( "Plane: \"t=320%2F%28r%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"120%2F%28r-100%29=320%2Fr\"
\n" ); document.write( "\"3%2F%28r-100%29=4%2Fr\"
\n" ); document.write( "\"3%2Ar=4%2A%28r-100%29\"
\n" ); document.write( "...
\n" ); document.write( "r=400 miles per hour
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