Answer: x = 108
Given the below equation
x + 13 1/2 = 121 1/2
Firstly, we need to convert the mixed fraction into an improper fraction
Let
and
. By the product rule,

By the power rule, we have
and
, but
are functions of
, so we also need to apply the chain rule:


and we have


So we end up with

Replace
to get everything in terms of
:

We can simplify this by factoring:


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