document.write( "Question 1184804: X and Y can assemble machine parts together in 30 days. They started work and Y left work after 20 days. X assemnled the remaining machine parts in 20 days. In how many days X can assemble machine parts by himself? \n" ); document.write( "
Algebra.Com's Answer #815440 by josgarithmetic(39627) ![]() You can put this solution on YOUR website! \n" ); document.write( "\n" ); document.write( "-\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Equations might be easier to handle if a substitution is made: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "Elimination Method should be easier this way.\r \n" ); document.write( "\n" ); document.write( "-\r \n" ); document.write( "\n" ); document.write( "E2-E1: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Back-substituting, \n" ); document.write( "and you can solve for y whatever way you want. \n" ); document.write( " |