Respuestas

2012-10-23T23:15:56+02:00

A) 3x+13 = 10x-15

    13+15 = 10x-3x

      28    = 7x

          x = 28/7

          x= 4

 

B) 6X+3 = 5X-3

    6X-5X = -3-3

       x= -6

 

C) 12X+18=10X+16

      12X-10X=16-18

           2x =-2

             X=-2/2

             X= -1