Respuestas

2012-03-11T12:37:10+01:00

x - [3 + 2 (6 - 2x)]= 2(2x - 5) 

x - (3 + 12 - 4x) = 4x - 10

x - 3 - 12 + 4x = 4x - 10

x + 4x - 4x = -10 + 3 + 12

x = 5