Question

What is the value of x

Answer 1

If I'm correct your equation is
3x+50=6x−10
Now we solve it
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Subtract 6x from each side
3x+50−6x=6x−10−6x
−3x+50=−10
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Subtract 50 from each side
−3x+50−50=−10−50
-3x = -60
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Divide each side by -3
-3x ÷ -3 = -60 ÷ -3
x = 20

Answer 2

the angles are congruent because they are vertical so we can set them equal to one another.

3x + 50 = 6x - 10
3x + 60 = 6x
60 = 3x
20 = x