First determine the value of slope m.
m = (35 - 3)/(12 - 0) = 8/3
Then, use the equation of the line.
y - 35 = 8/3 (x - 12)
3(y - 35) = 8(x - 12)
3y - 105 = 8x - 96
8x - 3y + 9 = 0
or
y - 3 = 8/3 (x - 0)
3(y - 3) = 8(x - 0)
3y - 9 = 8x
8x - 3y + 9 = 0