Find the equation of the line L with circumference 24, which is perpendicular to 3x + 4y-12 = 0 and surrounded by two coordinate axes

Find the equation of the line L with circumference 24, which is perpendicular to 3x + 4y-12 = 0 and surrounded by two coordinate axes

The slope of 3x + 4y-12 = 0 is - 3 / 4
The slope of line L is 4 / 3
The equation of line L: y = 4x / 3 + k
Intersection of line L and coordinate axis (0, K) (- 3K / 4,0)
|k|+|-3/4k|+√(k^2+9k^2/16)=24
|k|+|3k/4|+|5/4k|=24
3|k|=24
k=±8
The equation of line L: y = 4x / 3 ± 8