QUIZ

Question 1/12
Si $\dfrac{mgL}{4t+1}=U$ alors t = ?
  $\dfrac{mgLU-1}{4}$
  $\dfrac{mgL-1}{4}$
  $\dfrac{mgL-U}{4U}$
  $\dfrac{mgL}{4\left(U-1\right)}$
  $\dfrac{U-mgL}{4}$