Question

find the relation between x and y if the area of triangle formed by points (x ,y) , (1 ,2) and (7 ,0) is 7 sq.units

Answer 1

7=1/2[2x-y+7y-14]
14=2x+6y-14
28=2x+6y
14=x+3y
hence,
x=14-3y

Answer 2

here is your correct answer