document.write( "Question 402708: I'm trying to determine how much E85 fuel to mix with E10 fuel to arrive at a final mixture of E20 in a 16 gallon gas tank. I think the equation would be .85X + .1X = .2, but I'm not sure about how you factor in the 16 gallon tank capacity. \n" ); document.write( "
Algebra.Com's Answer #284988 by ankor@dixie-net.com(22740)\"\" \"About 
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I'm trying to determine how much E85 fuel to mix with E10 fuel to arrive at a
\n" ); document.write( " final mixture of E20 in a 16 gallon gas tank.
\n" ); document.write( " I think the equation would be .85X + .1X = .2, but I'm not sure about how you
\n" ); document.write( "factor in the 16 gallon tank capacity.
\n" ); document.write( ":
\n" ); document.write( "let x = amt of E85 fuel
\n" ); document.write( "then
\n" ); document.write( "(16-x) = amt of E10
\n" ); document.write( ":
\n" ); document.write( "The equation would be
\n" ); document.write( ".85x + .10(16-x) = .20(16)
\n" ); document.write( "
\n" );