Find the value of (3x) in the figure
To find the missing angle, we need to find x.
[tex]3x + 2x - 10 = 180\\\\5x - 10 = 180\\\\5x = 190\\\\x = 38[/tex]
Now, we plug in what we got for x into 3x.
[tex]3(38)\\\\114[/tex]
The value of 3x is 114.