m_{1} c (T_{1} - T_{2}) + m c_{x} (T_{1} - t_{1}) = m_{2} c (T_{2} - T_{1}) - m c_{x} (t_{2} - T_{2})

${m_1c(T_1 - T_2) + mc_x(T_1 - t_1) = m_2c(T_2 - T_1) - mc_x(t_2 - T_2)}$

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