document.write( "Question 1107937: Three sisters, Amy,Beth, and Carly are different ages. Amy is 7 years older than Beth. Carly is twice the age of Beth. The sum of their ages is 47.
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Algebra.Com's Answer #722973 by Edwin McCravy(20060)\"\" \"About 
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Three sisters, Amy,Beth, and Carly are different ages.
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\n" ); document.write( "Amy is 7 years older than Beth.
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document.write( "A = B+7\r\n" );
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\n" ); document.write( "Carly is twice the age of Beth.
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document.write( "C = 2B\r\n" );
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\n" ); document.write( "The sum of their ages is 47
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document.write( "A+B+C = 47\r\n" );
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document.write( "Substitute B+7 for A and 2B for C in\r\n" );
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document.write( " A  + B +  C = 47\r\n" );
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document.write( "B+7 + B + 2B = 47\r\n" );
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document.write( "Simplify and solve for B.\r\n" );
document.write( "Then to get A, substitute what you got for B\r\n" );
document.write( "in A = B+7.\r\n" );
document.write( "Then to get C, substitute what you got for B\r\n" );
document.write( "in C = 2B.\r\n" );
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document.write( "Edwin
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