Respuesta :

scrett2000
well to find out X, you have to do the opposite to what it's asking to each side. So 11=x-4

+4 onto the 11 and + 4 on to the -4 which means you just have 15=X
11= x-4
To find x you must isolate x, which means in this case you must add 4 to each side.
11 + 4 = x - 4 + 4
15 = x
To test this to make sure its right just fill in x to what you found its equal to:
X - 4 = 11
(15) - 4 = 11
And its correct!