document.write( "Question 548678: Three times as many robins as cardinals visited a bird feeder. If a total of 20 robins and cardinals visited the feeder, how many were robins ? \n" ); document.write( "
Algebra.Com's Answer #357153 by edjones(8007)\"\" \"About 
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there is a 3:1 ratio.
\n" ); document.write( "3+1=4
\n" ); document.write( "1/4 cardinals
\n" ); document.write( "3/4 robins
\n" ); document.write( "20 * 1/4 = 5
\n" ); document.write( "20 * 3/4 = 15
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