Question

I don't know how to solve this and the answer isn't 4 or 0 so what is it?4=-4+a​

Answer 1

The answer is 8. This is because when you substitute 8 with “a” you then solve the problem to see if it is equal to the answer. -4+8=4... -4+4=0 so that is wrong and -4+O=-4 which is also incorrect.