Respuestas

2013-06-12T00:41:25+02:00
     2x-3y+4z=26
(4) 20x+8y-4z=20
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(7) 22x+5y= 46
(-5)  6x+7y  = -10
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 154x+35y=322
-30x-35y= 50
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124x=372