Answer is 16
4=0.5z-4
4+4=0.5z
8=0.5z
z=16
I isolated Z
Your sister is 24. Your brother is 20. You are 15. Therefore, your sister will be 48 years old. I’m 87% sure I did this right. Lol, good luck.
I believe you are right :) because they are the same
