Respuesta :

4(x+3.3)=28
/4             /4
x+3.3=7
  -3.3  -3.3
x=3.7
4(x+3.3)=28.  then solve it for x by distributing 4 so it will be simplified to 4x+13.2=28.  Then subtract 13.2 from 28 and get this equation: 4x=14.8.  Then divide 4 to isolate x and you get your answer :  
x=3.7