document.write( "Question 1029768: scooter travels 12 miles in the same time that a bicycle covers 5 miles. if the rate of the scooter is 2 mph more than twice the rate of the bicycle find both rates \n" ); document.write( "
Algebra.Com's Answer #644713 by josmiceli(19441)\"\" \"About 
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Let \"+t+\" = the time in hrs for
\n" ); document.write( "both scooter and bicycle
\n" ); document.write( "Let \"+r+\" = the rate of the bicycle in mi/hr
\n" ); document.write( "\"+2r+%2B+2+\" = the rate of the scooter in mi/hr
\n" ); document.write( "-------------------------------------
\n" ); document.write( "Equation for the bicycle:
\n" ); document.write( "(1) \"+5+=+r%2At+\"
\n" ); document.write( "Equation for the scooter:
\n" ); document.write( "(2) \"+12+=+%28+2r+%2B+2+%29%2At+\"
\n" ); document.write( "---------------------
\n" ); document.write( "(1) \"+t+=+5%2Fr+\"
\n" ); document.write( "Substitute this result into (2)
\n" ); document.write( "(2) \"+12+=+%28+2r+%2B+2+%29%2A%28+5%2Fr+%29+\"
\n" ); document.write( "Multiply both sides by \"+r+\"
\n" ); document.write( "(2) \"+12r+=+10r+%2B+10+\"
\n" ); document.write( "(2) \"+2r+=+10+\"
\n" ); document.write( "(2) \"+r+=+5+\"
\n" ); document.write( "and
\n" ); document.write( "\"+2r+%2B+2+=+2%2A5+%2B+2+\"
\n" ); document.write( "\"+2r+%2B+2+=+12+\"
\n" ); document.write( "--------------------
\n" ); document.write( "The rate of the bicycle is 5 mi/hr
\n" ); document.write( "The rate of the scooter is 12 mi/hr
\n" ); document.write( "-----------------------------
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+5+=+r%2At+\"
\n" ); document.write( "(1) \"+5+=+5%2At+\"
\n" ); document.write( "(1) \"+t+=+1+\" hr
\n" ); document.write( "and
\n" ); document.write( "(2) \"+12+=+%28+2r+%2B+2+%29%2At+\"
\n" ); document.write( "(2) \"+12+=+%28+2%2A5+%2B+2+%29%2At+\"
\n" ); document.write( "(2) \"+12+=+12t+\"
\n" ); document.write( "(2) \"+t+=+1+\" hr
\n" ); document.write( "OK
\n" ); document.write( "
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