Answer:
x = 41
Step-by-step explanation:
(2x+20) + (2x-4) = 180 degrees
4x+16 = 180 degrees
4x = 164
x = 41
The two sides are supplementary and add up to 180 degrees.
To find this value, simply substitute the number 10 in for x in your equation:


The answer is 98.

Therefore, there are

millimeters in seven meters.
The sum of the first n natural numbers and 0=
n*(n+1)/2