document.write( "Question 710824: A plane can fly 700 miles in the same time as it takes a car to go 300 miles. If the car travels 80 mph slower than the plane, find the speed of the plane.
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Algebra.Com's Answer #437203 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+t+\"$ = the time in hours for a plane fly 700 miles and a car to go 300 miles
\n" ); document.write( " $\"+700%2Ft+\"$ = the plane's speed in mi/hr
\n" ); document.write( " $\"+300%2Ft+\"$ = the car's speed in mi/hr
\n" ); document.write( "given:
\n" ); document.write( " $\"+700%2Ft+-+300%2Ft+=+80+\"$
\n" ); document.write( " $\"+700+-+300+=+80t+\"$
\n" ); document.write( " $\"+80t+=+400+\"$
\n" ); document.write( " $\"+t+=+5+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+700%2Ft+=+700%2F5+\"$
\n" ); document.write( " $\"+700%2Ft+=+140+\"$
\n" ); document.write( "The speed of the plane is 140 mi/hr
\n" ); document.write( "check answer:
\n" ); document.write( " $\"+700%2Ft+-+300%2Ft+=+80+\"$
\n" ); document.write( " $\"+700%2F5+-+300%2F5+=+80+\"$
\n" ); document.write( " $\"+140+-+60+=+80+\"$
\n" ); document.write( " $\"+80+=+80+\"$
\n" ); document.write( "OK
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