document.write( "Question 395635: A boy said I have as many brothers as i have sisters.Then his sister said i have double the number of brothers as i have sistes.Find the number of brothers and sisters. \n" ); document.write( "
Algebra.Com's Answer #280772 by richard1234(7193)\"\" \"About 
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The boy says that he has x brothers and x sisters, so there are x+1 boys and x girls. The sister says that she has 2y brothers and y sisters, so 2y boys and y+1 girls. These numbers differ by 1, so\r
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\n" ); document.write( "\n" ); document.write( "2y = x+1
\n" ); document.write( "y+1 = x\r
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\n" ); document.write( "\n" ); document.write( "Solving, we get y = 2, so there are 3 girls and 4 boys.
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