document.write( "Question 201001: solve system of equations by substitution
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Algebra.Com's Answer #151231 by RAY100(1637)\"\" \"About 
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(1) 2y=13,,,,y=13/2 = 6.5
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\n" ); document.write( "(2) x =-y +5 = -(6.5) +5 = -1.5
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