Answer :

standard form = Ax + By = C 

y − 3 = 6/7(x-7)

y - 3 = 6/7 x - 6 

-y           -y

-3 = 6/7 x - y - 6
 +6            +6

3  = 6/7x - y 

6/7 x - y = 3

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