Respuesta :

Answer: 33/4

Step-by-step explanation:

2(4x+6)=78

8x+12=78

8x = 78-12

8x=66

X=66/8

x= 33/4

In another way,

2(4x+6)=78

4x+6=78/2

4x+6=39

4x=39-6

4x=33

x= 33/4 (Answer)