Question

2,5(2x+8)-9=5(3x-10)-5+x

Answer 1

2,5 (2x + 8) - 9 = 5 (3x - 10) - 5 + x --->
5x + 20 - 9 = 15x - 50 - 5 + x --->
5x - 15x - x = - 50 - 5 - 20 + 9 --->
- 11x = - 66 . (-1) --->
11 x = 66 --->
x = 66 / 11 --->
x = 6

Answer 2

2,5(2x+8)-9=5(3x-10)-5+x
5x+20-9=15x-50-5+x
5x+11=16x-55
5x-16x=-11-55
-11x=-66  (-1)
11x=66
x=66/11
x=6