You can
put this solution on YOUR website!(5,6);x+8y=5
8Y=-X+5
Y=-X/8+5/8
6=-5/8+b
b=5+5/8
b=(5*8+5)/8
b=(40+5)/8
b=45/8 THE Y INTERCEPT.
Y=-X/8+45/8 (GREEN LINE)LINE EQUATION WITH SLOPE (m)=-1/8, PASSING THROUGH (5,6) & PARALLEL TO THE LINE Y=-X/8+5/8. (RED LINE).

(graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -x/8 +5/8 and -x/8 +45/8).