document.write( "Question 553434: solve the system of equations using the substitution method
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Algebra.Com's Answer #852290 by MathTherapy(10556)\"\" \"About 
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document.write( "solve the system of equations using the substitution method\r\n" );
document.write( "x+z=8\r\n" );
document.write( "y-z=5\r\n" );
document.write( "x-y=9\r\n" );
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document.write( "x + z = 8____z = 8 - x ---- eq (i)\r\n" );
document.write( "y - z = 5 ----- eq (ii)\r\n" );
document.write( "x - y = 9___x - 9 = y ----- wq (iii)\r\n" );
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document.write( "y - z = 5\r\n" );
document.write( "x - 9 - (8 - x) = 5 ------ Substituting x - 9 for y, and 8 - x for z in eq (ii)\r\n" );
document.write( "x - 9 - 8 + x = 5\r\n" );
document.write( "x + x - 17 = 5\r\n" );
document.write( "2x = 22\r\n" );
document.write( "\"highlight_green%28matrix%281%2C5%2C+x%2C+%22=%22%2C+22%2F2%2C+%22=%22%2C+11%29%29\"\r\n" );
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document.write( "x - 9 = y\r\n" );
document.write( "11 - 9 = y ------ Substituting 11 for x in eq (iii)\r\n" );
document.write( "\"highlight_green%28matrix%281%2C5%2C+y%2C+%22=%22%2C+11+-+9%2C+%22=%22%2C+2%29%29\"\r\n" );
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document.write( "z = 8 - x\r\n" );
document.write( "z = 8 - 11 ------ Substituting 11 for x in eq (i)\r\n" );
document.write( "\"highlight_green%28matrix%281%2C5%2C+z%2C+%22=%22%2C+8+-+11%2C+%22=%22%2C+-+3%29%29\"
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