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paso1---->5-3x <7
- 3x <7-5
- 3x <2/*-1
3x >-2
x >-2/3
x >-0,6.....
paso2--->5-3x>-7
- 3x>-7-5
-3x>-12/*-1
3x <12
x <12/3
x <4
XE 《-2/3,4》