document.write( "Question 942939: solve by the method of substitution \r
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Algebra.Com's Answer #575503 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "solve by the method of substitution \r
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4x + 2y = 10_____2(2x + y) = 2(5)_____2x + y = 5 ------ eq (i)
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document.write( "x - y = 13______x = 13 + y ------- eq (ii)
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document.write( "2(13 + y) + y = 5 ------ Substituting 13 + y for x in eq (i)
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document.write( "26 + 2y + y = 5
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document.write( "2y + y = 5 - 26
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document.write( "3y = - 21
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document.write( ", or  \r
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document.write( "x = 13 - 7 ------- Substituting - 7 for y in eq (ii)
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document.write( "You can do the check!! 
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