document.write( "Question 1056369: Systems with three variables (couldn't find the right category sorry)\r
\n" );
document.write( "\n" );
document.write( "Solve using elimination:
\n" );
document.write( "X+2y=2
\n" );
document.write( "2x+3y-z=-9
\n" );
document.write( "4x+2y+5z=1\r
\n" );
document.write( "\n" );
document.write( "I just need to know how to start it really. TIA! \n" );
document.write( "
Algebra.Com's Answer #671513 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Solve using elimination: \n" ); document.write( "X+2y=2 \n" ); document.write( "2x+3y-z=-9 \n" ); document.write( "4x+2y+5z=1 \n" ); document.write( "----- \n" ); document.write( "Since the 1st eqn has no z term, eliminate that 1st. \n" ); document.write( " \n" ); document.write( "10x+15y-5z=-45 -- 2nd eqn times 5 \n" ); document.write( "4x +2y + 5z =1 \n" ); document.write( "------------------------ Add \n" ); document.write( "14x + 17y = -44 \n" ); document.write( " \n" ); document.write( "Now it's 2 eqns in x & y. \n" ); document.write( "Can you do the rest? \n" ); document.write( " \n" ); document.write( " |