document.write( "Question 1064593: Solve system by substitution
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\n" ); document.write( "Solve system by substitution
\n" ); document.write( "x-2y=-7
\n" ); document.write( "8x-2y=0
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x - 2y = - 7_____x = 2y - 7 ----- eq (i)
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document.write( "8x - 2y = 0 ------- eq (ii)
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document.write( "Note also that eq (ii) can remain as is, or it can be REDUCED by dividing it by its GCF, 2
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document.write( "8(2y - 7) - 2y = 0 -------- Substituting 2y - 7 for x in eq (ii) ------ eq (ii)
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document.write( "16y - 56 - 2y = 0
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document.write( "16y - 2y = 56
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document.write( "14y = 56
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document.write( "x = 2(4) - 7 ------ Substituting 4 for y in eq (i) 
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