Answer:
x = 45
Explanation:
Since we know that all angles in a triangle are equal to 180 degrees, We already have a equation.
2x + 10 + 30 + 50 = 180
Subtract 50.
2x + 10 +30 = 130
Substract 30.
2x + 10 = 100
Substract 10.
2x = 90
Now that we have isolated the variable, we divide both sides by 2.
x = 45.