document.write( "Question 490848: the ratio petrol to oil is 25 to 1. how much oil would you use in 5l of petrol? \n" ); document.write( "
Algebra.Com's Answer #334337 by ccs2011(207)\"\" \"About 
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Set up a proportion:
\n" ); document.write( "Put petro amounts on top, oil amounts on bottom\r
\n" ); document.write( "\n" ); document.write( "--> \"25%2F1+=+51%2Fx\"
\n" ); document.write( "Multiply both sides by x
\n" ); document.write( "--> \"25x+=+51\"
\n" ); document.write( "--> \"x+=+51%2F25+=+2.04\"
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