Respostas

2014-05-19T00:05:30-03:00

5-x/9-x-3-x/12=1/4
180/36 - 4x/36 - 36x/36 - 108/36 - 3x/36 = 9/36
-4x - 36x - 3x = 9 - 180 + 108
-43x = -63 (-1)
x=63/43

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