Question

ecuacion con comprobacion
5+x-7=6+3x+9-x

Answer 1

Resolver.

5 + x - 7 = 6 + 3x + 9 - x

5 - 7 + x = 6 + 9 + 3x - x

- 2 + x = 15 + 2x

- 2 - 15 = 2x - x
 
    - 17 = x

Answer 2

x-3x+x=6+9-5
2x-3x=15-5
-1x=10
x=10sobre1
x=10