7/9x+4=2/3X+8 Решение:1/2x+1/6x=x-3Решение:

7/9х - 2/3х = 8 - 4                     1/2х + 1/6х - х = -3          7/9х - 6/9х = 4                          3/6х + 1/6х - х = - 31/9х = 4                                    4/6х - х = - 3 х = 4 : 1/9 = 4 * 9/1                  -2/6х = - 3х = 36                                       х = - 3 : (- 2/6) = -3 * (-6/2)х = 36                                       х = 18/2 = 9