The number is 6
4x-9=15
4x=24
X=6
Isolate the h. Do the opposite of the sign given - Because of equal sign, what you do to one side you do to the other
h/4 = 9
h/4(4) = 9(4)
h = 9(4)
h = 36
36 is your answer for "h"
hope this helps
A full turn is 360 degrees. If you put 180/360 you can simplify the answer to 1/2. 180 degrees of a turn is half of a turn.