Решите подалуста 7x=9x+8

7x - 9x = 8  - 2x = 8 2x = - 8 x = - 8/2 x = - 4 

7x = 9x + 8 7x = 8 +9х 7x + -9x = 8 + 9x + -9x -2x = 8 + 9x + -9x 9x + -9x = 0 -2x = 8 + 0 -2x = 8 x = -4