Question

If R denotes rent, W denotes wages and I denotes interest, find the values
of rent, wages and interest from the following information.
2R+ 4W - I = 9
3R+W -21 = 7
R+3W - 31 = 4
Ans. R =1, W = 2, 1 = 1 (use either Cramer's rule or matrix inversion)​

Answer 1

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