Solve {l}{U=frac{-K(frac{Tz-T_{1}}{2L})}{-K(frac{T_{2}-T_{1}}{2L}-qL/K}}

$$\left. \begin{array}{l}{ U = \frac { - K ( \frac { T z - T _ { 1 } } { 2 L } ) } { - K ( \frac { T _ { 2 } - T _ { 1 } } { 2 L } - \frac { q L } { K } } }\end{array} \right.$$

Solve for U, K, T, z, T_1, L

$$z\in \mathrm{R}$$

$$U=\frac{Tz-T_{1}}{2L}$$

$$K\in \mathrm{R}$$

$$T\in \mathrm{R}$$

$$T_{1}\in \mathrm{R}$$

$$L\in \mathrm{R}$$