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15x-12x=35-28-1
3x=6
x=2
2x + 28 - 14x = 35 - 15x - 1
- 12x + 28 = 34 - 15x
- 12x + 15x = 34 - 28
3x = 6
x = 6/3
x = 2
Solución :
x = 2