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The total monthly earnings of a worker in a factory is given by \( I=p+qx+ry\), where X denotes the number of points of honesty and Y denotes the number of points of punctuality. Data for three months are as follows : (a) represent the above data by linear equations and write its matrix form. (b) Is it possible to solve the system of equations so obtained using matrices?

Month Earning No. Of Points
  X Y
1 6950 40 10
2 6725 35 9
3 7100 40 12


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