What is the solution to 11 = x - 4?

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!