Respuesta :

Answer:

x = 12

Step-by-step explanation:

-3x+12=48

      -12 -12

*subtract 12 from both sides

-3x = 36

-3x/3 = 36/3

*divide 3 from each sides

x = 12

-3x+12=48
-3x=48-12
-3x= 36
x= 36/3
x= 12