T. Haavelmo devised a model of the US economy for the years 1929–1941 based on the following equations: (i) c = 0.712y + 95.05 (ii) s = 0.158(c + x) − 34.30 (iii) y = c + x − s (iv) x = 93.53 Here x denotes total investment, y is disposable income, s is the total saving by firms, and c is total consumption. Write the system of equations in the form (1) when the variables appear in the order x, y, s, and c. Then find the solution of the system.

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