document.write( "Question 628002: using the substitution method to solve the following system of equations.\r
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document.write( "x + y = 3
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document.write( "2x + 2y = 10
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document.write( " Please show work \n" );
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Algebra.Com's Answer #395384 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! multiply the first by 2 \n" ); document.write( "2x+2y=6 \n" ); document.write( "2x+2y=10 \n" ); document.write( "subtract \n" ); document.write( "0=-4 \n" ); document.write( "No they don't so there is no solution. \n" ); document.write( "They are parallel. \n" ); document.write( "y=-x+3 \n" ); document.write( "divide the second by 2 \n" ); document.write( "x+y=5 \n" ); document.write( "y=-x+5 \n" ); document.write( "they have the same slope (-1) \n" ); document.write( "I didn't use substitution. \n" ); document.write( "x=3-y \n" ); document.write( "2(3-y)+2y=10 \n" ); document.write( "6-2y+2y=10 \n" ); document.write( "6=10 \n" ); document.write( "no they don't \n" ); document.write( "there is no solution \n" ); document.write( " |