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Find y when x = 7 and z = 6.
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Find y when x = 7 and z = 6.

Find y when x = 7 and z = 6.-example-1
User Nmyk
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Varies jointly means that y is related to the product of x and z:
.. y = k*x*z
.. 64 = k*8*4
.. k = 64/32 = 2

Then for your new numbers,
.. y = 2*7*6
.. y = 84
User Schleichardt
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