document.write( "Question 646969: Solve by substitution or elimination
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document.write( "2x-3y=8
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document.write( "-4x+5y=-10
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document.write( "i got the answer (-1,-6) but I'm not sure if it's correct it would be much appreciated if you did the elimination method, thank you. \n" );
document.write( "
Algebra.Com's Answer #405990 by MathLover1(20850)![]() ![]() You can put this solution on YOUR website! 2x-3y=8..............1\r \n" ); document.write( "\n" ); document.write( "-4x+5y=-10...........2 \n" ); document.write( "_________________________\r \n" ); document.write( "\n" ); document.write( "2x-3y=8..............1...both sides multiply by 2\r \n" ); document.write( "\n" ); document.write( "2x*2-3y*2=8*2 \n" ); document.write( "4x-6y=16 \n" ); document.write( "_____________________________________...now take 1a and 2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4x-6y=16...............1a \n" ); document.write( "+ \n" ); document.write( "-4x+5y=-10...........2 \n" ); document.write( "_________________________________...add them...\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4x-4x-6y+5y=16-10\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-y=6....both sides multiply by -1\r \n" ); document.write( "\n" ); document.write( "-y*(-1)=6*(-1)\r \n" ); document.write( "\n" ); document.write( "y=-6\r \n" ); document.write( "\n" ); document.write( "now find x\r \n" ); document.write( "\n" ); document.write( "2x-3y=8..............1\r \n" ); document.write( "\n" ); document.write( "2x-3(-6)=8\r \n" ); document.write( "\n" ); document.write( "2x+18=8\r \n" ); document.write( "\n" ); document.write( "2x=8-18\r \n" ); document.write( "\n" ); document.write( "2x=-10\r \n" ); document.write( "\n" ); document.write( "x=-5 \n" ); document.write( " |