Meena S. answered 11/17/17
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Equation of a line passes thru (x1, y1) & slope m is
y-y1=m(x-x1)
Equation of a line passes thru (7,4), slope =-8/3,
y-4 =-8/3(x-7),
Multiply eq by 3,we get
3y -12 =-8x+56
3y+8x-68=0