Question

Помогите решить уравнение 5х+(3х-3)=6х+11 (Х-7)-(2х+9)= -13

Answer 1

1) 5x + (3x - 3) = 6x + 11
    5x + 3x - 3 = 6x + 11
   8x - 6x = 11 + 3
   2x = 14
    x = 7
2) (x - 7) - (2x + 9) = - 13
     x - 7 - 2x - 9 = - 13
     - x = 7 + 9 - 13
     -x = 3
      x = - 3

Answer 2

5х+(3х-3)=6х+11
5х+3х-3=6х+11
5х+3х-6х=3+11
2х=14
х=14:2
х=7