1/2 I guess I don't think you typed in the question correctly. Not trying to be mean.
Let's begin by listing out the information given to us:

We proceed to combine like terms (the coefficients having the same variable), we have:
Answer:
-9 
or
-9.25
Step-by-step explanation:
V = 180 cm3
l = 10 cm
w = 4 cm
h = ?
V=lwh, so to get h, divide equation by lw, to get h=V/(lw).
h = 180/(10*4) = 4.5 cm