document.write( "Question 22580: How Do I Graph These Equations?\r
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document.write( "3x+y=5
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document.write( "-2x+3y=4\r
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Algebra.Com's Answer #11001 by sgt_spike(2)![]() ![]() ![]() You can put this solution on YOUR website! First solve for y. \n" ); document.write( "To do this multiply 3x+y=5 by -3 on both sides of the equation. \n" ); document.write( "(-3)3x+y=5(-3) \n" ); document.write( "-9x-3y=-15 \n" ); document.write( "subtract this equation from the other equation \n" ); document.write( "-9x-3y=-15 \n" ); document.write( "-2x+3y=4\r \n" ); document.write( "\n" ); document.write( "-11x=-11 \n" ); document.write( "Divide by -11 on both sides to get x=1\r \n" ); document.write( "\n" ); document.write( "substitute the 1 in the equation -2x+3y=4 \n" ); document.write( "-2(1)+3y=4 \n" ); document.write( "-2+3y=4 \n" ); document.write( "Now solve for y \n" ); document.write( "2-2+3y=4+2 \n" ); document.write( "3y=6 \n" ); document.write( "y=2\r \n" ); document.write( "\n" ); document.write( "start point (1,2) \n" ); document.write( "Thats how to solve it. DOn't know how to graph it. Sorry \n" ); document.write( " |