Answer :

Let the equation of plane be


Direction ratios of parallel planes are related to each other as



Putting the values from the equation of a given parallel plane,




Putting in the equation of a plane



As the plane is passing through (1,-2,7), it must satisfy the plane,


(1)




Putting value in equation (1), we have



5x + 4y-11z + 80=0


So, the required equation of the plane is 5x + 4y-11z + 80=0.


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