document.write( "Question 476000: A gas station owner has 30 gallons of gasoline for which he charges $3.03 per gallon and
\n" ); document.write( "some for which he charges $3.74 per gallon. How many gallons of the $3.74 brand must the owner mix in to produce gasoline that costs $3.28 per gallon? \n" ); document.write( "

Algebra.Com's Answer #326435 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"x\"$ = gallons of $3.74 gas to be mixed in
\n" ); document.write( "In words:
\n" ); document.write( "( cost of $3.03 gas ) + ( cost of $3.74 gas ) = ( cost of $3.28 gas )
\n" ); document.write( "given:
\n" ); document.write( "Cost of $3.03 gas = $\"+3.03%2A30+=+90.9+\"$
\n" ); document.write( "Cost of $3.74 gas = $\"+3.74x+\"$
\n" ); document.write( "Cost of $3.28 gas = $\"+3.28%2A%2830+%2B+x%29+\"$
\n" ); document.write( "--------------------------------
\n" ); document.write( " $\"+90.9+%2B+3.74x+=+3.28%2A%2830+%2B+x%29+\"$
\n" ); document.write( " $\"+90.9+%2B+3.74x+=+98.4+%2B+3.28x+\"$
\n" ); document.write( " $\"+.46x+=+7.5+\"$
\n" ); document.write( " $\"+x+=+16.304++\"$
\n" ); document.write( "The owner must mix in 16.304 gallons of the $3.74 gas
\n" ); document.write( "check answer:
\n" ); document.write( " $\"+90.9+%2B+3.74x+=+3.28%2A%2830+%2B+x%29+\"$
\n" ); document.write( " $\"+90.9+%2B+3.74%2A16.304+=+3.28%2A%2830+%2B+16.304%29+\"$
\n" ); document.write( " $\"+90.9+%2B+60.977+=+3.28%2A46.304+\"$
\n" ); document.write( " $\"+151.877+=+151.877+\"$
\n" ); document.write( "OK \n" ); document.write( "

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