Answer:
x=5, and it is equilateral
Step-by-step explanation:
if x+4 and 2x-1 are 100% equal, then x has to be equal to 5. That makes all sides equal to 9 meaning it is equilateral
x=5
All of the sides have to be equal to 9 because AC is 9 so 5+4 is 9 and 2x5-1 is 9.
Are you actually in high school? I learned this in 3rd grade.
