Answer:
X = 60
Step-by-step explanation:
All angles in a triangle have to add up to 180 degrees. Therefore we can set up an equation like this:
[tex]40 + (x + 20) + x = 180[/tex]
Now, all we have to do is solve:
[tex]Combine:\\60 + 2x = 180\\Minus:\\2x = 120\\Divide:\\x = 60[/tex]
Therefore, x is equal to 60.
We can check this by plugging x into the angles and adding all of them up :
40 + (60 + 20) + 60 = 180
40 + 80 + 60 = 180
120 + 60 = 180
180 = 180
I hope this helps!!
If you have any questions let me know!
- Kay :)
