ANSWER
B. 31°, 106°, and 43°
Step-by-step explanation
First, we have to find the value of x. Knowing that the sum of the measures of all the interior angles of a triangle is 180°, we can write an equation for x,

Add like terms,

Add 10 to both sides,

And divide both sides by 19,1

Now, replace the value of x = 10 in the expressions for each angle's measure to find their values,

Hence, the set of angle measures for this triangle is 31°, 106°, and 43°.