or
The quantity
z
varies jointly with
x
and
y
and inversely with
w
.
When
x
12
,
y
12
,
and
w
6
,
z
48
.
What is the equation of variation?
Write your answer in the form
A
or
A
B
,
where
A
and
B
are constants or variable expressions. Remember to include the value of k, the constant of variation, in exact form.
z
c
ref_doc_title.

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