4+3-1x22
4+3-22
7-22
-15
So -15 is the answer
We have to know the angle that is not labelled. (lets call it y)
9x + y= 180
and the sum of the angles of a triangle is 180
5x + (9+x) + y=180
2 simultaneous equations
Answer:
d is your Answer .............
First one is 12^2
second one is 1
