Inicialmente vamos escalonar a matriz:
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,4],[,,,2,,,,,6,,,,,3,-,2,|,,,,10],[-,4,-,12,,-,7,,,,,0,|,-,10],[,,,6,,,,18,,,,,11,,,,0,|,,,,14]]]
overset(l_2 = l_2 - l_1)(->)
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,4],[,,,0,,,,,0,,,,,0,-,3,|,,,,,,6],[-,4,-,12,,-,7,,,,,0,|,-,10],[,,,6,,,,18,,,,,11,,,,0,|,,,,14]]]
overset(l_3 = l_3 + 2 l_1)(->)
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,4],[,,,0,,,,,0,,,,,0,-,3,|,,,,,,6],[,,,0,,,,,0,,-,1,,,,,2,|,,-,2],[,,,6,,,,18,,,,,11,,,,0,|,,,,14]]]
overset(l_4 = l_4 - 3 l_1)(->)
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,4],[,,,0,,,,,0,,,,,0,-,3,|,,,,,,6],[,,,0,,,,,0,,-,1,,,,,2,|,,-,2],[,,,0,,,,,0,,,,,2,-,3,|,,,,,,2]]]
overset(l_4 = l_4 + 2 l_3)(->)
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,,4],[,,,0,,,,,0,,,,,0,-,3,|,,,,,,,6],[,,,0,,,,,0,,-,1,,,,,2,|,,,-,2],[,,,0,,,,,0,,,,,0,,,,,1,,|,,,-,2]]]
overset(l_2 harr l_3)(->)
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,,4],[,,,0,,,,,0,,,-,1,,,,,2,|,,,,-,2],[,,,0,,,,,0,,,,,,0,-,3,|,,,,,,,6],[,,,0,,,,,0,,,,,,0,,,,,1,,|,,,-,2]]]
overset(l_4 = l_4 + ((1)/(3)) l_3)(->)
[[[,,,,2,,,,,6,,,,,,3,,,,,1,|,,,,,,,4],[,,,0,,,,,0,,,-,1,,,,,2,|,,,,-,2],[,,,0,,,,,0,,,,,,0,-,3,|,,,,,,,6],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]
overset(l_1 = ((1)/(2)) l_1)(->) [[[,,,,1,,,,,3,,,,,,(3)/(2),,,,,(1)/(2),|,,,,,,,2],[,,,0,,,,,0,,,-,1,,,,,2,|,,,,-,2],[,,,0,,,,,0,,,,,,0,-,3,|,,,,,,,6],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]
overset(l_2 = - l_2)(->)
[[[,,,,1,,,,,3,,,,,,(3)/(2),,,,,(1)/(2),|,,,,,,,2],[,,,0,,,,,0,,,,,,1,-,2,|,,,,,,,2],[,,,0,,,,,0,,,,,,0,-,3,|,,,,,,,6],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]
overset(l_1 = l_1 - ((3)/(2)) l_2)(->)
[[[,,,,1,,,,,3,,,,,,0,,,,,(7)/(2),|,,,,,-,1],[,,,0,,,,,0,,,,,,1,,-,2,|,,,,,,,,2],[,,,0,,,,,0,,,,,,0,-,3,|,,,,,,,6],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]
overset(l_3 = (- (1)/(3)) l_3)(->)
[[[,,,,1,,,,,3,,,,,,0,,,,,(7)/(2),|,,,,,-,1],[,,,0,,,,,0,,,,,,1,-,2,|,,,,,,,,2],[,,,0,,,,,0,,,,,,0,,,,1,|,,,,-,2],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]
overset(l_1 = l_1 - ((7)/(2)) l_3)(->)
[[[,,,,1,,,,,3,,,,,,0,,,,,0,|,,,,,,,6],[,,,0,,,,,0,,,,,,1,-,2,|,,,,,,,2],[,,,0,,,,,0,,,,,,0,,,,1,|,,,,-,2],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]
overset(l_2 = l_2 + 2 l_3)(->)
[[[,,,,1,,,,,3,,,,,,0,,,,,0,|,,,,,,,6],[,,,0,,,,,0,,,,,,1,,,,,0,|,,,,-,2],[,,,0,,,,,0,,,,,,0,,,,1,|,,,,-,2],[,,,0,,,,,0,,,,,,0,,,,,0,,|,,,,,,,0]]]