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x+(3x+3)=8+(2x+1)
4x+3=9+2x
4x-2x=9-3
2x=6
x=6/2
x=3
x - 2x - 1 = 8 - 3x - 3
- x - 1 = - 3x + 5
- x + 3x = 5 + 1
2x = 6
x = 6/2
x = 3
Respuesta.
x = 3