1) 2/7x = 1
x = 7/2
2) 9x = 1
x = 1/9
3) 1 5/8x = 1
x = 8/13
4) 1/2x = 1
x = 2
5) 7/15x = 1
x = 15/7
6) 3 2/5x = 1
x = 5/17
7) 100x = 1
x = 1 /100
8) 2/13x = 1
x = 13/2
1) 2/7x = 1
x = 7/2
2) 9x = 1
x = 1/9
3) 1 5/8x = 1
x = 8/13
4) 1/2x = 1
x = 2
5) 7/15x = 1
x = 15/7
6) 3 2/5x = 1
x = 5/17
7) 100x = 1
x = 1 /100
8) 2/13x = 1
x = 13/2