Answer:
x=20
Step-by-step explanation:
The line is a straight line, which is 180 degrees
x+100+3x = 180
Combine like terms
100+4x = 180
Subtract 100 from each side
100+4x-100=180-100
4x=80
Divide by 4
4x/4 = 80/4
x=20
Answer:
7-z
Step-by-step explanation:
X= -12 and that’s you answer
Polygons's interiro angles make a total of (n-2)*180 degree, n being the number of sides.
in this case, n=6
(6-2)*180=117+124+102+145+107+x
x=125