Answer:
5-(1+5)= -1
-2(1+4)=-10
Step-by-step explanation:
Using subUsing substitution for Y, the top equation becomes X +6z= 180. Using elimination with X +6z= 180 and subtracting X+z= 90 result is 5z=90 and Z= 18. So complimentary angle is 18°
I believe that would be 7