Respuestas

2012-10-04T04:05:26+02:00

2x - (x + 1) = 5x + 2

        4             6

 

2x - x - 1 = 5x + 2 

        4             6           :::::::::  se multiplica en cruz

 

6 ( 2x - x -1) = 4 (5x +2)

12x -6x -6= 20x + 8

6x - 20x = 6 +8

-14x= 14

x= 14 / -14

x= -1

2012-10-04T04:09:00+02:00

6( 2x - (x + 1)) = 4( 5x +2)

6( 2x - x - 1)= 20x + 8

12x - 6x - 6 = 20x + 8

6x - 6 = 20x + 8

-6 -8 = 20x - 6x

 -14 = 14x

 x = -14/ 14 = -1