document.write( "Question 174024: During the last five races, jim's race car used an average of 15 gallons of gas per race. If his race car used a total of 51 gallons of gas during the first three races, what was the total number of gallons of gas used during the last two races? \n" ); document.write( "

Algebra.Com's Answer #128928 by Mathtut(3670) $\"\"$ $\"About$

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let z be the gas used in the last two races
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\n" ); document.write( "51+z/5=15........
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\n" ); document.write( "51+z=75
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\n" ); document.write( "z=75-51
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\n" ); document.write( " $\"highlight%28z=24%29\"$ gallons used in the last 2 races.
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