document.write( "Question 459179: I am still not getting this can anyone help me with this?\r
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document.write( "solve by elimination method
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document.write( "-7x+5y=-20
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document.write( "-3x-2y=8
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document.write( "I know that I am to multiply the first equation by 2 and the second equation by 5 which would give me -14x+10y=-4 and -15x-10y=40. Then I am to add them which would give me -29x=36 but I don't know where to go from there. Can someone help me please, thank you so much \n" );
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Algebra.Com's Answer #314919 by math-vortex(648)![]() ![]() You can put this solution on YOUR website! I always appreciate when a student tells us what they've tried so far. Good work! \n" ); document.write( "... \n" ); document.write( "I see a small arithmetic error in your first equation. Multiplying the right side by 2 gives (2)(-20)=-40 so your new equation would be -14x+10x=-40. \n" ); document.write( "... \n" ); document.write( "Add the two equations, \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "to give, \n" ); document.write( " \n" ); document.write( "Divide both sides by -29. \n" ); document.write( " \n" ); document.write( "Now, substitute 0 for x into one of the original equations to find the y-value. It doesn't matter which one. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "... \n" ); document.write( "So, the solution to your system of equations is the order pair (0,-4). It's always a good idea to check your work for possible errors. \n" ); document.write( "... \n" ); document.write( "CHECK: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "Good. Now check the other equation. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Winner, winner, chicken dinner! (o:\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |