If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
y-45 = (-8/7)*(x-20) // - (-8/7)*(x-20)
y-((-8/7)*(x-20))-45 = 0
(8/7)*(x-20)+y-45 = 0
8/7*(x-20)+y-45 = 0
8/7*(x-20)+y-45 = 0
8/7*x+y-45-160/7 = 0
8/7*x+y-475/7 = 0
8/7*x+y-475/7 = 0
8/7*x+y-475/7 = 0 // - y-475/7
8/7*x = -(y-475/7) // : 8/7
x = (-(y-475/7))/8/7
x = 7/8*(475/7-y)
x = 7/8*(475/7-y)
| 3t-7=5t*6t | | (5x)/6+(x-4)/3=13/6 | | y=8+(-4/3)x | | 6k=115 | | g+3=16 | | 3x-5=4x+0.5(8x-6) | | 2/3r=18 | | 12=y/3 | | w+5=25 | | 88=11p | | 3=j-9 | | 12/2/3 | | 12q=60 | | 0.5x+15.6=x-3.45 | | 0.5x+16.6=x-3.45 | | 0.5+15.6=x-3.45 | | 1.5+0.2x=0.1 | | 200x-0.98=600x+0.02 | | 7+2m=-3 | | k-3=1 | | -0.08x=-5.6 | | Y=-2(-2)-7 | | y+9=22 | | 4x-16.8=x | | -16x+8(-2x-7)=8 | | 8x+8.98=6x+11 | | (100-4u/3)=(5u+6/4)+6 | | 6x+3(-2x+1)=3 | | 3c-10=5c-9 | | 3.4x-23=2.9x+8 | | 0.4x+0.7=-1.3 | | 6.1m+2.17=-24.67 |