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3 (7x) + 2 1
------------- > 8 - --------x
3 2²
3 (7x) + 2 x
-------------- > 8 - ------
3 2²
21x + 2 x
---------- > - ------- + 8
3 2²
21x + 2 (-x) + (2²) + 8
---------- > ----------------------
3 2²
21x + 2 -x + 32
---------- > ------------
3 2²
4 (21x) + 4 (2) > -3x + 3 (32)
84x + 8 > - 3x + 96
84x + 3x > 96 - 8
87x > 88
x > 88/87
Respuesta :
x = (88/87,∞)