document.write( "Question 234069: solve the following system of equations using substitutions 2x-3y=-2 and y=-4x+24 \n" ); document.write( "
Algebra.Com's Answer #172660 by mando271(42)![]() ![]() ![]() You can put this solution on YOUR website! You are already given what y equals in the 2nd equation, just plug that into the 1st equation and solve for x.\r \n" ); document.write( "\n" ); document.write( "2x-3(-4x+24)=-2\r \n" ); document.write( "\n" ); document.write( "2x+12x-72=-2\r \n" ); document.write( "\n" ); document.write( "14x=70\r \n" ); document.write( "\n" ); document.write( "x=5\r \n" ); document.write( "\n" ); document.write( "now plug this into the 2nd equation to solve for y.\r \n" ); document.write( "\n" ); document.write( "y=-4(5)+24\r \n" ); document.write( "\n" ); document.write( "y=-20+24\r \n" ); document.write( "\n" ); document.write( "y=4\r \n" ); document.write( "\n" ); document.write( "plug both numbers back into both orginal equations to verify. \n" ); document.write( " |