The value of the variable x is 28. Option D
First, we should know that the sum total of the angles in any triangle is 180 degrees.
Since we have that the angles are represented as;
50, (2x), (3x - 10)
Then, we have to equate the angles to 180 degrees, we have the representation as;
50 + 2x + 3x - 10= 180
collect the like terms, we have;
5x = 180 - 40
5x = 140
Divide both sides by the coefficient of x, we get;
x = 28
The complete question:
The angle measures of a triangle are given as;
50 degrees
(2x) degrees
(3x - 10) degrees