Answer:
a. X=6°
b. 6(6)-8= 28°
c. 28+( 5(6)-2) = 56°
w(-15-w)= 0
w= 0 or (-15-w) = 0
Now,
-15-w =0
w= -15
So,The solution of w(-15-w) = 0
w= 0, -15