document.write( "Question 133951: A,B and C can finish a job in 6 days. If B and C work together,the job will take 9 days, if A anc C work alone the job will take 8 days. In how many days each man working alone do the job? Thank you.
\n" );
document.write( "This is what I have so far
\n" );
document.write( "1/x + 1/y + 1/z = 1/6
\n" );
document.write( "1/y + 1/z = 1/9
\n" );
document.write( "1/x + 1/z = 1/8
\n" );
document.write( "This is where I got lost
\n" );
document.write( "Help please thank you \n" );
document.write( "
Algebra.Com's Answer #97938 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! you have the right equations...just substitute\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting 2nd equation into 1st __ 1/x+1/9=1/6 \n" ); document.write( "__ multiplying by 18x __ 18+2x=3x __ 18=x\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting 3rd equation into 1st __ 1/y+1/8=1/6 \n" ); document.write( "__ multiplying by 24y __ 24+3y=4y __ 24=y\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting __ 1/18+1/24+1/z=1/6 \n" ); document.write( "__ multiplying by 72z __ 4z+3z+72=12z __ 72=5z __ 14.4=z \n" ); document.write( " |