Respuesta :

Answer:

C. all real numbers

Step-by-step explanation:

Answer:

it is c

Step-by-step explanation:

as 6x +12=3(2x+7)

.Therefore, 6x+12=6x+12

it is 0=0

it lies in the concept as we input the x it will be the same in two sides and these two equations represent the same line

so the answer is c