Question: 1. [Matrix Inversion in IS-LM Model] Given the IS equation 0.4Y +150r827 = 0, and the LM equation 0.1Y 250r155 = 0, find the equilibrium

1. [Matrix Inversion in IS-LM Model]

Given the IS equation

0.4Y +150r827 = 0,

and the LM equation

0.1Y 250r155 = 0,

find the equilibrium level of national income Y and the interest rate r by using the

technique of matrix inversion.

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