Respuesta :
The answer is 6. If you work it out the correct way, you should end up with 6. 3+6×2+4=19. 6 multiplied by 2 is 12. 3 added to 12 is 15 and 15 plus 4 is 19.
I think it's 4 because 4 times 2 plus 3 is 11 and and 4 is 15 and adding 4 to that gives you 19. 6 is incorrect to say as the unknown value.