7+6x/3 > 9x/4
7+6x > 12 (9x)
7+6x > 108x
6x -108x > 7
102x < -7
x=-7/102

4+14/7 >3x/2
4+14x > 14 (3x)
4x+14x > 42x
14x-42x > 4
x = 4/28

25x-8/20 > 3x/4
4(25x-8) > 20*3x
100x-32x > 20*3x
100x -3x > 32-20
97x > 12
x > -12/97