Matamática: Ecuaciones

                                                                                                                               
                                                                                       
a) x - 8 = 0                                   
b) -x+ 4 = 0                                  
c) x+ 5 = -3                                     
d) x - 2 = 17

                                     Verificación 
 a) x - 8 = 0                    x - 8 = 0 
      x - 8 + 8 = 0 + 8       8 - 8 = 0 
             x = 8

                                                   Verificación
b) - x + 4 = 0                    -x + 4 = 0                        
    - x + 4- 4 =0 + 4           - 4 + 4 = 0
      - x = -4

c) x + 5 = -3                    Verificación
    x + 5 - 5 =  -3 - 5         x + 5 = -3
          x     = -8               - 8 + 5 = -3

d) x - 2 = 17                     Verificación
    x - 2 + 2 = 17 + 2        x - 2 = 17
        x = 19                     19 - 2 = 17