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x - (2x + 1) = 16 - (2x + 3)
x - 2x - 1 = 16 - 2x - 3
- x - 1 = 13 - 2x
2x - x = 13 + 1
x = 14
Respuesta.
x = 14
x-2x-1=16-2x-3
opera
-x-1=13-2x
c cambian x a un lado los otros en otro
-x+2x=13+1
opera
x=14