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(+1+x)=2(7x-8)
1+x=14x-16
17=13x
17/13=x
- ( - 1 - x) = 2 (7x - 8)
1 + x = 14x - 16
1 + 16 = 14x - x
17 = 13x
17/13 = x
Respuesta.
x = 17/13