document.write( "Question 151276: The ratio of the number of red beads to blue beads in a box was 3:1. 3 more red and 4 more beads were added and the ratio became 2:1. How many red beads were there at first? \n" ); document.write( "

Algebra.Com's Answer #111171 by vleith(2983) $\"\"$ $\"About$

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$\"r%2Fb+=+3%2F1\"$
\n" ); document.write( " $\"r=3b\"$
\n" ); document.write( " $\"%28r%2B3%29%2F%28b%2B4%29+=+2%2F1\"$
\n" ); document.write( " $\"%283b%2B3%29%2F%28b%2B4%29+=+2%2F1\"$
\n" ); document.write( " $\"3b%2B3+=+2%28b%2B4%29\"$
\n" ); document.write( " $\"3b%2B3+=+2b+%2B+8\"$
\n" ); document.write( " $\"b+=+5\"$
\n" ); document.write( "So r = 15 \n" ); document.write( "

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