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x - (- 2x + 4) = 6 - (x + 3) + 5
x + 2x - 4 = 6 - x - 3 + 5
3x - 4 = 8 - x
3x + x = 8 + 4
4x = 12
x = 12/4
x = 3
Respuesta.
x = 3
x + 2x - 4 = 6 - x - 3 + 5
3x - 4 = 8 - x
3x + x = 8 + 4
4x = 12
x =
x = 3