please I need help. YOU BE THE TEACHER Your friend finds the difference. 7-(-12) = 7+ 12 = 19 Is your friend correct? yes or no Explain your reasoning

Answer:
Yes.
Step-by-step explanation:
Yes it is correct.
When any bracket is opened by "-" sign then the sign inside the bracket changes.
Here,
→7-(-12)
→7+12
→19
In the above question the bracket is opened by "-' and the sign of 12 is also negative. So, -×- changes into +.