Respuesta :

78 because when x=7, you put that in replace of x, and you put it in the equation like 6(7)+4(7)+8 you multiply 6x7 and 4x7 you get those and you add all of the numbers together to get 78.
6x+4x+8
6*7+4*7+8
42+28+8
78
So the answer is 78