Answer:
x = 129
Step-by-step explanation:
x and 51 are same- side exterior angles and supplementary, thus
x = 180 - 51 = 129
19degree I think
the sum of each angle on the straight line is 180 degree so if you want to find x you needed to subtract 180degree-51 degree then you will get the answer
1a
2b
3a
4c
5c
6c
7a
8d
9b
10b
11a
12c
13b
14a
15a
434.60
-2.2
By using the equation 5*(4+x)=9, when you isolate x you get -2.2.
