Respuesta :

Answer:

-2

Step-by-step explanation:

Answer:

e= - 2

Step-by-step explanation:

9e-7=7e-11

add 7 to each side of the equation ( -11 + 7 )

9e=7e-4

subtract 7e from both sides of the equation (9e-7e)

2e=-4

divide 2 to each side of the equation

e= - 2