Answer:
x = 2
Step-by-step explanation:
I just chucked it into Wolfram Alpha and it showed me x = 2
also for more proof, insert positive 2 in both x's
Answer:

Step-by-step explanation:
-The cumulative area of the six is equivalent to the sum of their individual areas.
-Area of a triangle is given by:

We substitute given values in the equation and multiply by the number of pennants:

Hence, the total area needed is 
The set of sides that cannot be the sides of a triangle is set A.
The sum of two sides of a triangle must be longer than the third side, but 6 + 10 is less than 21, so it cannot be a triangle.
Hope this helps =)