Х+8=8х-8 . 0.5*х*(х+3)=0,8*(10+х) , (х-2)/5=(х+3)/6

X+8=8x-8
x-8x=-8-8
-7x=-16
x=-16/(-7)
x=2.2/7

(x-2)*6     (x+3)*5
  - =0
    5              6
6x-12-(5x+15)
=0
        30
6x-12-5x-15
=0
          30
x-27
=0
  30

x-27=0
x=27