Please solve it without using MATLAB

11.12 The Lower Colorado River consists of a series of four reservoirs as shown in Fig. P11.12 Mass balances can be written for each reservoit, and the following set of simultaneous linear algebraic equations results: 13.422 0 -13.422 12.252 0 - 12.252 12.377 0 0 - 12.377 11.797 750.5 0 0 0 |||| 300 102 30 where the right-hand-side vector consists of the loadings of chloride to each of the four lakes and ... and the resulting chloride concentrations for Lakes Powell, Mead. Mohave, and Havasu, respectively, (a) Use the matrix inverse to solve for the concentrations in each of the four lakes Upper Colorado River 2 Lake Powell 2 Lake Mead Lake Mohave Lake Havasu