Problem $3$: Show that each term in the following equation can have the units of $l\frac{b}{f}{t}^3.$ Consider $u$ a velocity, $y$ a length, $x$ a length, $p$ a pressure, and $$ an absolute viscosity.

$0=-\frac{\text{d}\text{e}\text{l}\text{p}}{\text{d}\text{e}\text{l}\text{x}}+\frac{de{l}^{2}u}{del{y}^2}$