Resposta:
[tex]\left \{ {{2x-y=3} \atop {x+=3}} \right. \\\\3x=6\\x= 6/3 \\x = 2\\\\\left \{ {{x+y=5} \atop {3x-y=11}} \right. \\4x = 16\\x=16/4\\x = 4\\\\\left \{ {{x+y=7} \atop {x-y=1}} \right. \\2x = 8\\x = 8/2\\x = 4\\\\\left \{ {{2x-y=5} \atop {x+y=4}} \right.\\ \\3x = 9\\x = 9/3\\x = 3\\[/tex]
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Resposta:
[tex]\left \{ {{2x-y=3} \atop {x+=3}} \right. \\\\3x=6\\x= 6/3 \\x = 2\\\\\left \{ {{x+y=5} \atop {3x-y=11}} \right. \\4x = 16\\x=16/4\\x = 4\\\\\left \{ {{x+y=7} \atop {x-y=1}} \right. \\2x = 8\\x = 8/2\\x = 4\\\\\left \{ {{2x-y=5} \atop {x+y=4}} \right.\\ \\3x = 9\\x = 9/3\\x = 3\\[/tex]
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