document.write( "Question 317590: In a family there are two cars. In a given week, the first car gets an average of 15 miles per gallon, and the second car gets 35 miles per gallon. The two cars combined drive a total of 1575 miles in that week, for a total gas consumption of 65 gallons. How many gallons were consumed by each of the two cars that week? \n" ); document.write( "
Algebra.Com's Answer #227426 by mananth(16946)\"\" \"About 
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In a family there are two cars. In a given week, the first car gets an average of 15 miles per gallon, and the second car gets 35 miles per gallon. The two cars combined drive a total of 1575 miles in that week, for a total gas consumption of 65 gallons. How many gallons were consumed by each of the two ?
\n" ); document.write( "..
\n" ); document.write( "let one car drive x miles in the week
\n" ); document.write( "the other car will drive 1575-x miles in the week.
\n" ); document.write( "..
\n" ); document.write( "first car drove 15x miles
\n" ); document.write( "second drove (1575-x)miles
\n" ); document.write( "..
\n" ); document.write( "x/15+(1575-x)/35 = 65\r
\n" ); document.write( "\n" ); document.write( "35x+15(1575-x) / 15*35= 65
\n" ); document.write( "35x+23625-15x=15*35*65
\n" ); document.write( "20x=34125-23625
\n" ); document.write( "20x=10500
\n" ); document.write( "x=525 miles driven by first car
\n" ); document.write( "gallons consumed = 525/15= 35
\n" ); document.write( "..
\n" ); document.write( "1575-525= 1050 miles traveled by second car
\n" ); document.write( "1050/ 35
\n" ); document.write( "=30 gallons
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