8. 5/12 - 7/9x = 10 5/12 - 3x

5/12 - 7/9x = 125/12 - 3x
3x - 7/9x = 125/12 - 5/12
27/9x - 7/9x = 120/12
20/9x = 10
x = 10 * 9/20
x = 9/2