document.write( "Question 1203331: Betty baked some cheese buns and butter buns. After she sold 1/3 of the cheese buns and 2/5 of the butter buns, she had 50% as many butter buns as cheese buns left. What fraction of the buns baked was butter buns? \n" ); document.write( "
Algebra.Com's Answer #838832 by MathTherapy(10556)\"\" \"About 
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document.write( "Betty baked some cheese buns and butter buns. After she sold 1/3 of the cheese buns and 2/5 of the butter buns, she had 50% as many butter buns as cheese buns left. What fraction of the buns baked was butter buns?\r\n" );
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document.write( "Let number of cheese, and butter buns baked, be C and B, respectively\r\n" );
document.write( "As she sold \"1%2F3\" of cheese buns, \"matrix%281%2C5%2C+2%2F3%2C+of%2C+C%2C+or%2C+2C%2F3%29\" remained\r\n" );
document.write( "As she sold \"2%2F5\" of butter buns, \"matrix%281%2C5%2C+3%2F5%2C+of%2C+B%2C+or%2C+3B%2F5%29\" remained\r\n" );
document.write( "Since 50% as many butter as cheese remained, we get: \"matrix%282%2C3%2C+3B%2F5%2C+%22=%22%2C+.5%282C%2F3%29%2C+3B%2F5%2C+%22=%22%2C+C%2F3%29\"\r\n" );
document.write( "                                                      5C = 9B ---- Cross-multiplying\r\n" );
document.write( "                      Number of cheese buns baked, or \"matrix%281%2C5%2C+C%2C+%22=%22%2C+9B%2F5%2C+or%2C+1.8B%29\"\r\n" );
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document.write( "Number of buns baked: C + B = 1.8B + B = 2.8B\r\n" );
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document.write( "Number of butter buns baked: B\r\n" );
document.write( "Fraction of buns baked that were butter:
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