document.write( "Question 113423: Solve the system by addition.
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Algebra.Com's Answer #82600 by scott8148(6628)\"\" \"About 
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subtracting the second equation from the first gives x=2\r
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\n" ); document.write( "\n" ); document.write( "substituting into the first equation gives 5(2)-3y=13 ___ -3y=3 ___ y=-1
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