Answer:
x=5
Step-by-step explanation:
3x+1= 4x+(-4)
-4×+1= -4x-1 combine like terms
-1x= -5 divided by -1
x= 5
Answer:

Step-by-step explanation:
If you foil this equation you will get:

And by dividing it, you will get;

That is your answer!
A convex polygon
Hope this helps :)