Answer:
x=57
Step-by-step explanation:
Since the angles 'x' and '2x+7' add up to a supplementary angle (straight line)
we can then say;
[tex]x + 2x + 9 = 180[/tex]
[tex]3x = 180 - 9[/tex]
[tex]3x = 171[/tex]
[tex]x = \frac{171}{3} = 57[/tex]
I think 57
x+2x+9=180
3x+9=180
3x=180-9
3x=171
