What is your answer choices?
B. It grows as nuclear fusion in its core produces more matter.
The Piedmont<span> is a plateau region located in the eastern </span>United States<span>. It sits between the </span>Atlantic Coastal Plain<span> and the main </span>Appalachian Mountains<span>, stretching from </span>New Jersey<span> in the north to central </span>Alabama<span> in the south. The </span>Piedmont Province<span> is a </span>physiographic province<span> of the larger </span>Appalachian<span> division which consists of the </span>Piedmont Upland<span> and the </span>Piedmont Lowlands<span> sections</span>
By going to school and learning
Since this is a square you can set 3x+20=5x then you can solve for x.
Subtract 3x from both sides:
3x-3x+20=5x-3x
20=2x
Divide both sides by 2
20/2=2x/2
10=x
Hope this helps.