document.write( "Question 151405: 65. Solve the system of equations.
\n" );
document.write( "1.5x – 7y = 2
\n" );
document.write( "0.625x + 3y = –2.125
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #111304 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! 65. Solve the system of equations. \n" ); document.write( ": \n" ); document.write( "1.5x – 7y = 2 \n" ); document.write( "0.625x + 3y = –2.125 \n" ); document.write( ": \n" ); document.write( "Multiply the 1st equation by 3, and the 2nd equation by 7: \n" ); document.write( "4.500x - 21y = 6 \n" ); document.write( "4.375x + 21y = -14.875 \n" ); document.write( "--------------------------addition eliminates y, find x \n" ); document.write( "8.875x = -8.875 \n" ); document.write( "x = -1 \n" ); document.write( ": \n" ); document.write( "Find y using the 1st equation; \n" ); document.write( "1.5(-1) - 7y = 2 \n" ); document.write( "-1.5 - 7y = 2 \n" ); document.write( "-7y = 2 + 1.5 \n" ); document.write( "y = \n" ); document.write( "y = -.5 \n" ); document.write( "; \n" ); document.write( "check solutions in 2nd equation: \n" ); document.write( ": \n" ); document.write( "0.625x + 3y = –2.125 \n" ); document.write( "0.625(-1) + 3(-.5) = –2.125 \n" ); document.write( "-.625 - 1.5 = -2.125; confirms our solutions \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |