document.write( "Question 61545This question is from textbook Pre-Algebra
\n" );
document.write( ": Solving simultaneous equations
\n" );
document.write( "9.7x - 1.5y = 62.7
\n" );
document.write( "-2.3x - 7.4y = 8.4
\n" );
document.write( "Multiply each by 10 to get rid of decimals
\n" );
document.write( "Then solve for x in the second equation, so x = -74/23 X y - 840/23
\n" );
document.write( "Plug x into the first equation 97(-74/23 X y -840/23) - 15y = 62.7
\n" );
document.write( "Is this correct so far? I get bogged down in the math. Help!!! \n" );
document.write( "
Algebra.Com's Answer #43081 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! 1st: 9.7x - 1.5y = 62.7 \n" ); document.write( "2nd: -2.3x - 7.4y = 8.4 \n" ); document.write( "----------- \n" ); document.write( "Multiply each by 10 to get: \n" ); document.write( "3rd: 97x-15y=627 \n" ); document.write( "4th:-23x-74y=84 \n" ); document.write( "----------- \n" ); document.write( "Multiply 3rd by 74 and 4th by 15 to get: \n" ); document.write( "5th: 7178x-1110y=46398 \n" ); document.write( "6th: -345x-1110y=1260 \n" ); document.write( "------------- \n" ); document.write( "Subtract 6th from 5th to get: \n" ); document.write( "7523x=45138 \n" ); document.write( "x=6 \n" ); document.write( "--------- \n" ); document.write( "Substitute x=6 into 3rd to solve for y as follows: \n" ); document.write( "97(6)-15y=627 \n" ); document.write( "-15y=627-582=45 \n" ); document.write( "y=-3 \n" ); document.write( "----------- \n" ); document.write( "Solution: \n" ); document.write( "x=6, y=-3 \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |