crees que siempre hubo la misma cantidad de monóxido de carbono generada por el ser humano en la tierra a través de la historia​

d is correct the right of the people to be drafted into the armed forces.

hope this let me know if it is right.

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13

he is a vloger now and he could't be vlogging everyday when he had to do the casting for minato.

your answer is c i hope that