document.write( "Question 459793: solve by elimination:
\n" );
document.write( "
\n" );
document.write( "\r
\n" );
document.write( "\n" );
document.write( "thanks \r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #315310 by math-vortex(648)![]() ![]() You can put this solution on YOUR website! solve by elimination: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "-------------- \n" ); document.write( ". \n" ); document.write( "Multiply each term in the first equation by -2. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( ". \n" ); document.write( "Subtract the second equation from the first. \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Hmmm...we notice that both the x- and y-terms have cancelled out. We are left with 0 = 20 which is never true. This tells us that, the system has no solutions. \n" ); document.write( "Notice that when we multiplied the first equation by -2, we got \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "x and y have the same coefficients in both equations, so the slopes are the same. However, the y-intercepts are different (10 and -10). These lines are parallel. The lines never intersect, so the system has no solution. \n" ); document.write( " |