Question 1085737
c = -2t + 4/ t


{{{c=-2t+4/t}}}


You want to solve for t?
Do the same to each side of the equation.  You want all terms of t on one side of the equation.


Rational expression - common denominator, t.


{{{tc=t(-2t+4/t)}}}
{{{tc=-2t^2+4}}}
{{{-2t^2-ct+4=0}}}
multiply both sides by  (-1).
{{{2t^2+ct-4=0}}}--------------Quadratic equation, degree-two in t, and you wanted solve for t.  Can you continue on your own?