а - 7 5 + 3а
--------- = ------------
6 9
9 * (а - 7) = 6 * (5 + 3а)
9а - 63 = 30 + 18а
9а - 18а = 30 + 63
- 9а = 93
а = 93 : (- 9)
а = - 93/9
а = - 10 3/9
а = - 10 1/3
-------------------------------------------
х - 2 2х + 3
----------- = ---------------
6 8
8 * (х - 2) = 6 * (2х + 3)
8х - 16 = 12х + 18
8х - 12х = 18 + 16
- 4х = 34
х = 34 : (- 4)
х = - 34/4
х = - 8,5