Question 1059054
Z varies directly as x and inversely as y. 
Z = k*x/y
---------------------
Solve for "k" using "If z=123 when x=6 and y=6"
123 = k*6/6
k = 123
--------------
Equation::
Z = 123*x/y
------
Find z if x=7 and y=8.
Ans: Z = 123*7/8 = 138.375
----------------
Cheers,
Stan H.
-------------