Answer:
x=10
Step-by-step explanation:
A straight line has an angle of 180 degrees. To solve for x we can add all the given angles and set them equal to 180.
[tex]180= 5x-1+9x+8+2x+13[/tex]
Then combine all the common factors
[tex]180=16x+20[/tex]
And then you can solve for x
[tex]180= 16x+20\\160=16x\\10=x[/tex]
To check if x is correct you can plug in 10 to each equation. If all the equations add up to 180, then x is correct
[tex]5(10)-1= 49\\9(10)+8= 98\\2(10)+13= 33\\\\49+98+33=180[/tex]
