Respuesta :

16.3=x   this is my guess


1. Substitute 7 with 4
3x - 4(4) = 65 
3x - 16 = 65

2. Solve
3x - 16 = 65
     +16  +16
       3x = 81
       3       3
         x = 27

3. Check (Optional)
3(27) - 4(4) = 65
81 - 16 = 65
65 = 65