Answer:
x = 20
Step-by-step explanation:
first, you would take all of the angles and add them up to 180
2x+40+100=180
second, we combine like terms
2x+140=180
third, we solve for x
-140 -140
2x=40
x=20
i hope this helps!
X=20
the total angle degree of a triangle is always 180 so we have two point 100 and 40 add those and you get 140 so you have 40 left but that angle says 2 X so 2x is 40 so ÷ 2 to get 1x which is 20
