Question 419036
3x + 4y = 20
4y=-3x+20
y=(-3x/4)+5
x=0, y=5  (0,5)
y=0,x=20/3 (20/3,0)

..
3x - 2y = 8
2y=3x-8
y=(3x/2)-4
x=0, y=-4  (0,-4)
y=0, x=8/3 (8/3,0)

....
{{{drawing(300,300,-10,10,-10,10,circle(0,5,0.2),circle(20/3,0,0.2),circle(0,--4,0.2),circle(8/3,0,0.2),circle(4,2,0.2),graph(300,300,-10,10,-10,10,y=((-3x/4)+5),y=(3x/2)-4))}}}

The solution is the point of intersection (4,2)