Solve for $$ u $$. $$ \frac{u}{4}=\frac{u}{5}+4 $$ Simplify your answer as much as possible.

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Solve the equation $$ \frac{u}{4}=\frac{u}{5}+4 $$.
Solve the equation by following steps:
- step0: Solve for $$u$$:
  $$\frac{u}{4}=\frac{u}{5}+4$$
- step1: Multiply both sides of the equation by LCD:
  $$\frac{u}{4}	imes 20=\left(\frac{u}{5}+4ight)	imes 20$$
- step2: Simplify the equation:
  $$5u=4u+80$$
- step3: Move the variable to the left side:
  $$5u-4u=80$$
- step4: Subtract the terms:
  $$u=80$$
The solution to the equation $$\frac{u}{4}=\frac{u}{5}+4$$ is $$u=80$$.
$$ u=80 $$.

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