Question

Pls how do you verify this ​

Answer 1

I agree with the other answer but if you’re wondering why, you substitute it to see if you are right. Example: what is the value of x if x + 3 =4? X is 1. So to verify it you would replace x with 1. So it would be: 1+3=4. It proves your answer.

Answer 2

Plug 15 in for x i think