The proportion is
.
Apply cross products property: If
where
then
.


Add 9 to each side.
\

Subtract 6h from each side.
\


Multiply each side by 3.
\
Cancel common terms.
\
.
To check the solution, substitute the value of
in the proportion
.



Cancel common terms.
\
.
The above statement is true.
The value of
.