Question

What is the value of x in the figure?

Answer 1

100

Explanation:

Since the line is straight you know that both angles add up to 180 degrees.

You can create this equation:

57+x+23=180

And then solve

80+x=180

x=100

Hope this helps!

Answer 2

x = 100

Explanation:

x + 23 + 57 = 180 {linear pair}

x + 80 = 180

x = 180 -80

x = 100