Another option is to use a non-linear optimization routine, such as Excel's "Solver" input. Subtract 2339 from the right hand side, and use that as the objective function. Tell the Solver to give a value for T such that the right hand side is as close to zero as it can get. You may have to start from several different starting values for T, as non-linear optimizations can sometimes get "stuck" on local sub-optimal values.