20-10=10 therefore X=10
10+10=20
Postulate1:A line contains atleast 2 points.Postulate1a:A plane contains at least 3 points not all on one line.Postulate1b:Space contains atleast four points not all on one plane
I am pretty sure your answer is going to be 243
I hope this helps, and good luck!!
5x-y=3
Not sure if it’s correct