x = 45
Step-by-step explanation:
We know that adding these angles together will result in the whole line, which means together they are supplementary. We know that a straight line is equal to 180, so we will simply add these two together and set them equal to 180.
[tex]2x+45+x=180[/tex]
Add like terms.
[tex]3x+45=180[/tex]
Subtract 45 from both sides.
[tex]3x=135[/tex]
Divide.
x = 45
